# Emission Spectra of Elements

Save this PDF as:

Size: px
Start display at page:

Download "Emission Spectra of Elements"

## Transcription

1 Fall 2003 Emission Spectra of Elements Purpose: To compare and contrast the emission spectra of various gases. Investigate quantitatively the emission spectrum of hydrogen and relate it to Bohr's theory of atomic structure. Calculate the Rydberg constant Discussion: Emission Spectra When gases or vapors of elements are heated or exposed to high voltage they emit light. The emitted light can be split into its component wavelengths by passing it through a diffraction grating or prism. The emission spectrum is unique and characteristic to each element. Emission spectra of elements are line spectra, which reveals that the electronic energy levels are quantized. An electron within an atom may be excited to a higher energy level by absorbing e nergy from an electric discharge. When the electron relaxes back to its ground state, the energy is emitted as a photon of light. The lines arise because only a particular number of transitions are possible. These transitions are represented in the following diagram.

2 The emission spectrum of hydrogen consists of three series of lines: Lyman (ultraviolet), Balmer (visible), and Paschen (infrared). The Balmer series corresponds to transitions from excited states to the n=2 energy level. Balmer found that the wavelengths of the lines in the emission spectrum follow the rule: Rydberg constant R = x 10 7 m -1 Because wavelength,, is related to frequency,, and frequency is in turn related to energy, the energy of the emitted photon that corresponds to a transition from an initial state of higher energy E i to a final state of lower energy E f, is given by:, c = E = h E = hc/ Planck s constant h = 6.63 x (Js), Speed of light c = x 10 8 (m/s).. The Balmer series produce lines in the visible region, they have transitions between n f = 2 and n i = 3, 4, 5, or 6. You will use this series to calculate a value for the Rydberg constant.

3 Procedure Go to Observe the emission spectra for the elements listed on this page. Pay attention to the difference in complexity of the line spectra of hydrogen compared to the larger elements. Scroll down to the table of Most common elements in solar spectrum. Click on hydrogen.txt in the DataFile column. This will display a list of wavelengths of emission lines and their relative intensity. The first column states wavelengths in Angstroms (Å) (1 Angstrom = 1x10-10 m) Use the wavelength values to calculate a value of R for each transition (n=3 to n=2, n=4 to n=2, etc.) using, Tabulate your data in the space provided in page 4 Calculate the energy associated with each of the transitions. Calculate the value of the Rydberg constant Convert wavelength from Angstroms to meters Plot reciprocal wavelength (1/ ) vs 1/n 2 This should yield a linear relationship with slope R, and intercept R/4 Compare your results with the known value R = x 10 7 m -1. Repeat the above calculation of the Rydberg constant using selected data from any of the other emission spectra. Attach your plots to the lab report

4 Name Hydrogen Emission Spectrum Wavelength (Å) Transition n i to n f 1/ (m -1 ) 1/n 2 Energy (J) Value of R found from slope Value of R found from intercept Emission Spectrum for Wavelength (Å) Transition n i to n f 1/ (m -1 ) 1/n 2 Energy (J) Value of R found from slope Value of R found from intercept

5 Name Questions 1. The colors of the four lines of the hydrogen spectrum are: red, blue-green, and two shades of violet. Which initial states n i = 3, 4, 5, or 6 correspond to these colors? (Hint: The colors of the visible spectrum, from longest to shortest wavelengths, are: red, orange, yellow, green, blue, violet.) Wavelength[nanometers] Frequency[terahertz] Transitions to the n=1 (ground state) level from higher levels in the hydrogen atom never produce visible wavelength photons. Are the wavelengths produced by transitions to the n=1 level longer or shorter than visible wavelengths? Explain.

6 Name 3. Scroll down to the bottom of Click on the link to Color spectra of emission lines in planetary nebula [Java] Is there any evidence to suggest that iron is present in the NGC2440 planetary nebula? 4. Compare your values of R with the quoted value of R = x 10 7 m -1 Material sourced from:

### Atomic Emission Spectra

Atomic Emission Spectra Objectives The objectives of this laboratory are as follows: To build and calibrate a simple box spectroscope capable of measuring wavelengths of visible light. To use this spectroscope

More information

### Experiment 13 ~ Diffraction, Wavelength, and Atomic Line Spectra

Experiment 13 ~ Diffraction, Wavelength, and Atomic Line Spectra Part 1 1.1. Atomic Line Spectra. In this experiment, we will look at the diffraction of light, and how wavelengths can be calculated from

More information

### nm cm meters VISIBLE UVB UVA Near IR 200 300 400 500 600 700 800 900 nm

Unit 5 Chapter 13 Electrons in the Atom Electrons in the Atom (Chapter 13) & The Periodic Table/Trends (Chapter 14) Niels Bohr s Model Recall the Evolution of the Atom He had a question: Why don t the

More information

### Electron Energy and Light

Why? Electron Energy and Light How does light reveal the behavior of electrons in an atom? From fireworks to stars, the color of light is useful in finding out what s in matter. The emission of light by

More information

### Atoms Absorb & Emit Light

Atoms Absorb & Emit Light Spectra The wavelength of the light that an element emits or absorbs is its fingerprint. Atoms emit and absorb light First Test is Thurs, Feb 1 st About 30 multiple choice questions

More information

### Light and Spectra. COLOR λ, nm COLOR λ, nm violet 405 yellow 579 blue 436 orange 623 green 492 red 689

Light and Spectra INTRODUCTION Light and color have intrigued humans since antiquity. In this experiment, you will consider several aspects of light including: a. The visible spectrum of colors (red to

More information

### 5.111 Principles of Chemical Science

MIT OpenCourseWare http://ocw.mit.edu 5.111 Principles of Chemical Science Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms. 5.111 Lecture Summary

More information

### EMISSION SPECTROSCOPY

INTRODUCTION: EMISSION SPECTROSCOPY Lab #4 The emission spectrum is the set of light frequencies emitted by substances after they have been excited with various forms of energy, most commonly heat or electrical.

More information

### DIFFRACTION AND INTERFERENCE OF LIGHT

DIFFRACTION AND INTERFERENCE OF LIGHT Part A - The Diffraction Grating The objective of this part of the experiment is to measure the wavelength of light produced by a monochromatic source using a diffraction

More information

### Electromagnetic Radiation and Atomic Spectra POGIL

Name _Key AP Chemistry Electromagnetic Radiation and Atomic Spectra POGIL Electromagnetic Radiation Model 1: Characteristics of Waves The figure above represents part of a wave. The entire wave can be

More information

### EXPERIMENT 13. Balmer Series of Hydrogen

EXPERIMENT 13 Balmer Series of Hydrogen Any atomic gas or element (heated to vapor form) can be made to radiate light when suitably "excited" by an electric discharge, spark, or flame. If this light is

More information

### The Hydrogen Spectrum

The Hydrogen Spectrum Reading assignment: Chang, Chemistry 10 th edition, pp. 8-87. Goals We will become familiar with the operation of the grating spectroscope in order to determine the wavelengths of

More information

### Experiment #12: The Bohr Atom. Equipment: Spectroscope Hydrogen and Helium Gas Discharge Tubes, Holder, and Variac Flashlight

Experiment #12: The Bohr Atom Purpose: To observe the visible spectrum of hydrogen and helium and verify the Bohr model of the hydrogen atom. Equipment: Spectroscope Hydrogen and Helium Gas Discharge Tubes,

More information

### Bohr s Model and Emission Spectra of Hydrogen and Helium

PHYS-01 LAB-03 Bohr s Model and Emission Spectra of Hydrogen and Helium 1. Objective The objective of this experiment is to study the emission spectrum of hydrogen and to understand its origin in terms

More information

### PC1144 Physics IV. Atomic Spectra. Reference angular position θ 0 = Data Table 1

Name: Date: PC1144 Physics IV Atomic Spectra 5 Laboratory Worksheet Part A: Mercury Spectrum Reference angular position θ 0 = Colour λ (10 7 m) θ 1 θ 2 Violet 4.047 Blue 4.358 Blue-Green 4.916 Green 5.461

More information

### Laboratory 15: Spectroscopy

Spectroscopy 1 aboratory 15: Spectroscopy A transmission diffraction grating consists of a large number of closely spaced parallel lines ruled on some transparent material such as glass. The ruled lines

More information

### Photons. ConcepTest 27.1. 1) red light 2) yellow light 3) green light 4) blue light 5) all have the same energy. Which has more energy, a photon of:

ConcepTest 27.1 Photons Which has more energy, a photon of: 1) red light 2) yellow light 3) green light 4) blue light 5) all have the same energy 400 nm 500 nm 600 nm 700 nm ConcepTest 27.1 Photons Which

More information

### Problem Set 1 Solutions

Chemistry 36 Dr. Jean M. Standard Problem Set Solutions. The first 4 lines in the visible region of atomic line spectrum of hydrogen atom occur at wavelengths of 656., 486., 434.0, and 40. nm (this is

More information

### Flame Tests & Electron Configuration

Flame Tests & Electron Configuration INTRODUCTION Many elements produce colors in the flame when heated. The origin of this phenomenon lies in the arrangement, or configuration of the electrons in the

More information

### Chapter 6 Electronic Structure of Atoms

Chapter 6 Electronic Structure of Atoms 1. Electromagnetic radiation travels through vacuum at a speed of m/s. (a). 6.626 x 26 (b). 4186 (c). 3.00 x 8 (d). It depends on wavelength Explanation: The speed

More information

### Light. Light. Overview. In-class activity. What are waves? In this section: PSC 203. What is it? Your thoughts?

Light PSC 203 Overview In this section: What is light? What is the EM Spectrum? How is light created? What can we learn from light? In-class activity Discuss your answers in groups of 2 Think of as many

More information

### Planck s Constant. 1 Purpose. 2 Methodology. 2.1 Equipment Used. Jeffrey Sharkey, Spring 2006 Phys. 2033: Quantum Lab

Planck s Constant Jeffrey Sharkey, Spring 2006 Phys. 2033: Quantum Lab 1 Purpose The purpose of this lab is to observe the photoelectric effect, and specifically how kinetic energy is defined using stopping

More information

### Phantastic Photon and LEDs

Answers to Questions: Phantastic Photon and LEDs Phantastic Photons A. Glow-in-the-right color Note #1: the LEDs are not monochromatic; the listed wavelengths are the peaks of the intensity spectrums provided

More information

### Name Date Class ELECTRONS IN ATOMS. Standard Curriculum Core content Extension topics

13 ELECTRONS IN ATOMS Conceptual Curriculum Concrete concepts More abstract concepts or math/problem-solving Standard Curriculum Core content Extension topics Honors Curriculum Core honors content Options

More information

### Electromagnetic Radiation and Atomic Physics

Electromagnetic Radiation and Atomic Physics Properties of Electrons, Protons, and Neutrons (The Main Constituents of Ordinary Matter) Mass Electrons have a mass of 9.11 10-31 kg. The mass of a proton

More information

### Atomic Emission Spectra (Teacher Demonstration)

SKILL FOCUS Analyzing and interpreting Communicating results Atomic Emission Spectra (Teacher Demonstration) When a high voltage current is passed through a glass tube that contains hydrogen gas at low

More information

### Light as a Wave. The Nature of Light. EM Radiation Spectrum. EM Radiation Spectrum. Electromagnetic Radiation

The Nature of Light Light and other forms of radiation carry information to us from distance astronomical objects Visible light is a subset of a huge spectrum of electromagnetic radiation Maxwell pioneered

More information

### Light is a type of electromagnetic (EM) radiation, and light has energy. Many kinds of light exist. Ultraviolet (UV) light causes skin to tan or burn.

Light and radiation Light is a type of electromagnetic (EM) radiation, and light has energy. Many kinds of light exist. Ultraviolet (UV) light causes skin to tan or burn. Infrared (IR) light is used in

More information

### Spectroscopy in Astronomy: Emission Spectra

Spectroscopy in Astronomy: Emission Spectra Equipment: (Shared among all lab groups) Blue spectrometer (one for each lab group) Spectrum tube power supplies (5000 volts be careful!) These will be set up

More information

### ATOMIC SPECTRA. Apparatus: Optical spectrometer, spectral tubes, power supply, incandescent lamp, bottles of dyed water, elevating jack or block.

1 ATOMIC SPECTRA Objective: To measure the wavelengths of visible light emitted by atomic hydrogen and verify the measured wavelengths against those predicted by quantum theory. To identify an unknown

More information

### DIFFRACTION GRATINGS AND SPECTROSCOPY

Experiment 8 Name: S.N.: SECTION: PARTNER: DATE: DIFFRACTION GRATINGS AND SPECTROSCOPY Objectives To introduce and calibrate a diffraction grating, and use it to examine several types of spectra. To learn

More information

### Outline. Chapter 6 Electronic Structure and the Periodic Table. Review. Arranging Electrons in Atoms. Fireworks. Atomic Spectra

Outline William L Masterton Cecile N. Hurley Edward J. Neth cengage.com/chemistry/masterton Chapter 6 Electronic Structure and the Periodic Table Light, photon energies and atomic spectra The hydrogen

More information

### AP CHEMISTRY CHAPTER REVIEW CHAPTER 6: ELECTRONIC STRUCTURE AND THE PERIODIC TABLE

AP CHEMISTRY CHAPTER REVIEW CHAPTER 6: ELECTRONIC STRUCTURE AND THE PERIODIC TABLE You should be familiar with the wavelike properties of light: frequency ( ), wavelength ( ), and energy (E) as well as

More information

### 5. The Nature of Light. Does Light Travel Infinitely Fast? EMR Travels At Finite Speed. EMR: Electric & Magnetic Waves

5. The Nature of Light Light travels in vacuum at 3.0. 10 8 m/s Light is one form of electromagnetic radiation Continuous radiation: Based on temperature Wien s Law & the Stefan-Boltzmann Law Light has

More information

### Description: Vocabulary: Objectives: Materials: Safety:

Title: Spectral Analysis with DVDs and CDs Author: Brendan Noon Date Created: Summer 2011 Subject: Physics/Chemistry/Earth Science Grade Level: 9-12 Standards: Standard 1: Analysis, Inquiry, and Design

More information

### Physics 221 Lab 14 Transformers & Atomic Spectra

Physics 221 Lab 14 Transformers & Atomic Spectra Transformers An application of Inductance The point of a transformer is to increase or decrease the voltage. We will investigate a simple transformer consisting

More information

### Demonstration Experiments: The Grating Spectrometer 27 September 2012

8 The Grating Spectrometer Introduction: A spectrometer is an instrument used to study the spectrum of light. The light source can be anything from a cryogenically cooled crystal to a superhot plasma or

More information

### ILLUSTRATIVE EXAMPLE: Given: A = 3 and B = 4 if we now want the value of C=? C = 3 + 4 = 9 + 16 = 25 or 2

Forensic Spectral Anaylysis: Warm up! The study of triangles has been done since ancient times. Many of the early discoveries about triangles are still used today. We will only be concerned with the "right

More information

### COLLEGE PHYSICS. Chapter 29 INTRODUCTION TO QUANTUM PHYSICS

COLLEGE PHYSICS Chapter 29 INTRODUCTION TO QUANTUM PHYSICS Quantization: Planck s Hypothesis An ideal blackbody absorbs all incoming radiation and re-emits it in a spectrum that depends only on temperature.

More information

### Astronomy 110 Homework #05 Assigned: 02/13/2007 Due: 02/20/2007. Name: (Answer Key)

Astronomy 110 Homework #05 Assigned: 02/13/2007 Due: 02/20/2007 Name: (Answer Key) Directions: Listed below are twenty (20) multiple-choice questions based on the material covered by the lectures thus

More information

### 3-1. True or False: Different colors of light are waves with different amplitudes. a.) True b.) False X

3-1. True or False: Different colors of light are waves with different amplitudes. a.) True b.) False X 3-2. True or False: Different colors of light are waves with different wavelengths. a.) True X b.)

More information

### From lowest energy to highest energy, which of the following correctly orders the different categories of electromagnetic radiation?

From lowest energy to highest energy, which of the following correctly orders the different categories of electromagnetic radiation? From lowest energy to highest energy, which of the following correctly

More information

### The Electronic Structures of Atoms Electromagnetic Radiation

The Electronic Structures of Atoms Electromagnetic Radiation The wavelength of electromagnetic radiation has the symbol λ. Wavelength is the distance from the top (crest) of one wave to the top of the

More information

### PROCEDURE. Part I: The Mercury Spectrum

The Spectroscope APPARATUS 1. Spectroscope 2. Mercury arc 3. Sodium Lamp 4. Geissler tubes with high voltage unit 5. Desk lamp 6. Filters INTRODUCTION This exercise will permit the student to study the

More information

### Emission and absorption spectra

Emission and absorption spectra Emission spectra You have learnt previously about the structure of an atom. The electrons surrounding the atomic nucleus are arranged in a series of levels of increasing

More information

### The Nature of Light. As a particle

The Nature of Light Light is radiant energy. Travels very fast 300,000 km/sec! Can be described either as a wave or as a particle traveling through space. As a wave A small disturbance in an electric field

More information

### Quantum Mechanics I Physics 325. Importance of Hydrogen Atom

Quantum Mechanics I Physics 35 Atomic spectra and Atom Models Importance of Hydrogen Atom Hydrogen is the simplest atom The quantum numbers used to characterize the allowed states of hydrogen can also

More information

### Experiment 1: Grating Spectroscope

SPECTRA White light is a mixture of all wavelengths. When white light is sent through a prism or a diffraction grating it is broken up into a continuous distribution of colors called a spectrum. The relation

More information

### Light, Light Bulbs and the Electromagnetic Spectrum

Light, Light Bulbs and the Electromagnetic Spectrum Spectrum The different wavelengths of electromagnetic waves present in visible light correspond to what we see as different colours. Electromagnetic

More information

### Chapter 7. Electron Structure of the Atom. Chapter 7 Topics

Chapter 7 Electron Structure of the Atom Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1 Chapter 7 Topics 1. Electromagnetic radiation 2. The Bohr model of

More information

### Review of the isotope effect in the hydrogen spectrum

Review of the isotope effect in the hydrogen spectrum 1 Balmer and Rydberg Formulas By the middle of the 19th century it was well established that atoms emitted light at discrete wavelengths. This is in

More information

### Chapter 11 Modern Atomic Theory

Chapter 11 Modern Atomic Theory Rutherford s Atom The concept of a nuclear atom (charged electrons moving around the nucleus) resulted from Ernest Rutherford s experiments. Question left unanswered: how

More information

### Building your own Spectroscope

Building your own Spectroscope 0-0.341-0.445-0.606-0.872-1.36 Lyman Balmer Paschen n=4 n=8 n=7 n=6 n=5 n=4 ENERGY/10-19 J -2.42-5.45 E 5 2 E 4 2 E 3 2 E E 5 3 4 3 n=3 n=2 (Many other transitions beyond

More information

### The Nature of Electromagnetic Radiation

II The Nature of Electromagnetic Radiation The Sun s energy has traveled across space as electromagnetic radiation, and that is the form in which it arrives on Earth. It is this radiation that determines

More information

### Energy (J) -8E-19 -1.2E-18 -1.6E-18 -2E-18

Spectrophotometry Reading assignment:. http://en.wikipedia.org/wiki/beer-lambert_law Goals We will study the spectral properties of a transition metal-containing compound. We will also study the relationship

More information

### Emission of Light & Atomic Models 1

Emission of Light & Atomic Models 1 Objective At the end of this activity you should be able to: o Explain what photons are, and be able to calculate their energies given either their frequency or wavelength.

More information

### Chapter 6 Electromagnetic Radiation and the Electronic Structure of the Atom

Chapter 6 In This Chapter Physical and chemical properties of compounds are influenced by the structure of the molecules that they consist of. Chemical structure depends, in turn, on how electrons are

More information

### Pre-Lab Assignment: Interference, Measuring Wavelengths, and Atomic Spectra

Name: Lab Partners: Date: Pre-Lab Assignment: Interference, Measuring Wavelengths, and Atomic Spectra (Due at the beginning of lab) Directions: Read over the lab handout and then answer the following questions

More information

### Spectra in the Lab ATOMS AND PHOTONS

Spectra in the Lab Every chemical element has a unique ``signature'' which can be revealed by analyzing the light it gives off. This is done by spreading the light out into a rainbow of color. It may seem

More information

### WAVES AND ELECTROMAGNETIC RADIATION

WAVES AND ELECTROMAGNETIC RADIATION All waves are characterized by their wavelength, frequency and speed. Wavelength (lambda, ): the distance between any 2 successive crests or troughs. Frequency (nu,):

More information

### TIME OF COMPLETION NAME SOLUTION DEPARTMENT OF NATURAL SCIENCES. PHYS 3650, Exam 2 Section 1 Version 1 October 31, 2005 Total Weight: 100 points

TIME OF COMPLETION NAME SOLUTION DEPARTMENT OF NATURAL SCIENCES PHYS 3650, Exam 2 Section 1 Version 1 October 31, 2005 Total Weight: 100 points 1. Check your examination for completeness prior to starting.

More information

### Chapter 7: The Quantum-Mechanical Model of the Atom

C h e m i s t r y 1 A : C h a p t e r 7 P a g e 1 Chapter 7: The Quantum-Mechanical Model of the Atom Homework: Read Chapter 7. Work out sample/practice exercises Suggested Chapter 7 Problems: 37, 39,

More information

### Finding The Energy of a Photon. F Scullion Some useful rearrangement triangles. Also note that 1 mole = 6.

1 Atomic Theory. Finding The Energy of a Photon F Scullion www.justchemy.com Some useful rearrangement triangles The Relationship between light and energy Converting frequency to wavelength Also note that

More information

### The Relationship Between Wavelength and Frequency in the Electromagnetic Spectrum

Name The Relationship Between Wavelength and Frequency in the Electromagnetic Spectrum Purpose: To discover and verify the relationship between Wavelength and Frequency of the Electromagnetic Spectrum.

More information

### The Phantastic Photon. Jim Overhiser, Gil Toombes, Martin Alderman. Regents Physics. Two 40-minute periods

Title: The Phantastic Photon Version: February 1, 2006 Authors: Appropriate Level: Abstract: Time Required: NY Standards Met: Special Notes: Jim Overhiser, Gil Toombes, Martin Alderman Regents Physics

More information

### Chapter 2 Electromagnetic Radiation

Chapter 2 Electromagnetic Radiation Bohr demonstrated that information about the structure of hydrogen could be gained by observing the interaction between thermal energy (heat) and the atom. Many analytical

More information

### The Evolution of the Atom

The Evolution of the Atom 1808: Dalton s model of the atom was the billiard ball model. He thought the atom was a solid, indivisible sphere. Atoms of each element were identical in mass and their properties.

More information

### Diffraction & Interference

Diffraction & Interference Introduction In 1704, Sir Isaac Newton postulated a theory that light is made up of particles. After all, a picture of light as a stream of particles readily explains the apparent

More information

### How is E-M Radiation Produced?

How is E-M Radiation Produced? 1. Accelerate charged particle back and forth like they do at the radio station. 2. All solids or liquids with temperature above Absolute Zero emit E-M radiation. Absolute

More information

### A. X-ray diffraction B. elemental analysis C. band gap energy measurement based on absorption of light D. none of the above

LED Review Questions 1. Consider two samples in the form of powders: sample A is a physical mixture comprising equal moles of pure Ge and pure Si; sample B is a solid solution of composition Si0.5Ge0.5.

More information

### Chapter 7. Quantum Theory and Atomic Structure

Chapter 7. Quantum Theory and Atomic Structure A problem arose in Rutherford s nuclear model. A nucleus and electron attract each other; to remain apart the electron must move. The energy of the electron

More information

### CHAPTER 4 Structure of the Atom

CHAPTER 4 Structure of the Atom 4.1 The Atomic Models of Thomson and Rutherford 4.2 Rutherford Scattering 4.3 The Classic Atomic Model 4.4 The Bohr Model of the Hydrogen Atom 4.5 Successes and Failures

More information

### The transitions labeled b, c, and a.

EXAM #3. ANSWERS ASTR 1101-001, Spring 2008 Refer to Figure 1 when answering the first 7 questions of this exam. 1. Which series of electron transitions in the energy-level diagram for Hydrogen produce

More information

### Spectrum of the Hydrogen Atom

Chapter 5. Hydrogen Atom Spectrum 29 5 Spectrum of the Hydrogen Atom Objective To calculate the Rydberg constant from the spectrum of atomic hydrogen. Preparation Overview 1. Read all of this write-up.

More information

### Bohr's Theory of the Hydrogen Atom

OpenStax-CNX module: m42596 1 Bohr's Theory of the Hydrogen Atom OpenStax College This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License 4.0 Abstract Describe

More information

### Period 14 Activity Solutions: Energy in Nature

Period 14 Activity Solutions: Energy in Nature 14.1 The Earth-Sun System 1) Energy from the sun Observe the models of the Earth, Moon, and Sun in the room. a) Imagine that the distance between the Earth

More information

### CHAPTER 12 ATOMS ONE MARK QUESTIONS WITH ANSWER. Ans: Electrons were discovered by J.J Thomason in the year 1897.

CHAPTER 12 ATOMS ONE MARK QUESTIONS WITH ANSWER 1. Who discovered electrons? Ans: Electrons were discovered by J.J Thomason in the year 1897. 2. What is the electric charge on an atom? Ans: At atom of

More information

### WAVES AND PARTICLES. (v) i.e (vi) The potential difference required to bring an electron of wavelength to rest

WAVES AND PARTICLES 1. De Broglie wavelength associated with the charges particles (i) The energy of a charged particle accelerated through potential difference q = charge on the particel (ii) Momentum

More information

### Assembly & Use Instructions -- Stanford Spectrographs

Assembly & Use Instructions -- Stanford Spectrographs Instructions You ll need: Spectrograph poster, diffraction grating, adhesive tape NOTE: Try not to touch the grating material, since the oils on your

More information

### Practice Problems (Set #1) Properties of Electromagnetic Radiation. 1. Why don't we notice the wave nature of matter in our everyday experience?

Practice Problems (Set #1) Properties of Electromagnetic Radiation 1. Why don't we notice the wave nature of matter in our everyday experience? Since matter has huge mass, the wavelength will be very large

More information

### Chemistry 102 Summary June 24 th. Properties of Light

Chemistry 102 Summary June 24 th Properties of Light - Energy travels through space in the form of electromagnetic radiation (EMR). - Examples of types of EMR: radio waves, x-rays, microwaves, visible

More information

### Spectrum Demonstration Kit

WWW.ARBORSCI.COM Spectrum Demonstration Kit 33-0200 KIT CONTENTS: Narrow slit mask Slit/Anti-slit mask Diffraction Grating Mount Six color filter cards with spectrum graphs Six 1 x 1.5 color filters Instructions

More information

### Estimated Answer Answer Displayed on Calculator 46.13 Final (Rounded) Answer

Some Using a TI Graphing Calculator (Adapted from Principles of Chemistry Lab Manual Edwards/McKay/Sink) These instructions provide a review of basic operations on a TI Graphing Calculator. You must be

More information

### Spectra of Lights: An Interactive Demonstration with Diffraction Gratings

Grades: 4 th 12 th grade Purpose: Students will explore the properties of different types of light bulbs using diffraction grating glasses to reveal the light s unique spectra or fingerprint. The goal

More information

### DIFFRACTION OF LIGHT

Laboratory Exercise 4. DIFFRACTION OF LIGHT Diffraction Gratings. Determining the Wavelength of Laser Light Using a Diffraction Grating. Refraction. Observation of Atomic Spectra. Theoretical background:

More information

### Topics through Chapter 4

Topics through Chapter 4 3.5 The Doppler Effect: this is how we learn about the motions of objects in the universe, discover extraterrestrial planets, black holes at the centers of galaxies, and the expansion

More information

### Chapter 11 Atoms, Energy and Electron Configurations Objectives

Objectives 1. To review Rutherford s model of the atom 2. To explore the nature of electromagnetic radiation 3. To see how atoms emit light A. Rutherford s Atom.but there is a problem here!! Using Rutherford

More information

### UNIT: Electromagnetic Radiation and Photometric Equipment

UNIT: Electromagnetic Radiation and Photometric Equipment 3photo.wpd Task Instrumentation I To review the theory of electromagnetic radiation and the principle and use of common laboratory instruments

More information

### The Electromagnetic Spectrum

The Electromagnetic Spectrum 1 Look around you. What do you see? You might say "people, desks, and papers." What you really see is light bouncing off people, desks, and papers. You can only see objects

More information

### Chemistry 2 Chapter 13: Electrons in Atoms Please do not write on the test Use an answer sheet! 1 point/problem 45 points total

Chemistry 2 Chapter 13: Electrons in Atoms Please do not write on the test Use an answer sheet! 1 point/problem 45 points total 1. Calculate the energy in joules of a photon of red light that has a frequency

More information

### Answer: b. Answer: a. Answer: d

Practice Test IV Name 1) In a single slit diffraction experiment, the width of the slit is 3.1 10-5 m and the distance from the slit to the screen is 2.2 m. If the beam of light of wavelength 600 nm passes

More information

### CHAPTER 6: ANSWERS TO ASSIGNED PROBLEMS Hauser- General Chemistry I revised 8/03/08

CHAPTER 6: ANSWERS TO ASSIGNED PROBLEMS Hauser- General Chemistry I revised 8/03/08 6.9 What are the basic SI units for? (a) the wavelength of light meters, although colors are usually reported in 3 digit

More information

### Electromagnetic Radiation Spectrum

Electromagnetic Radiation scillating electric and magnetic fields propagate through space Virtually all energy exchange between the Earth and the rest of the Universe is by electromagnetic radiation Most

More information

### THE EFFECT OF COLOUR FILTERS ON SOLAR PANELS. Katie Fitzgerald Expo Project Grade 7

THE EFFECT OF COLOUR FILTERS ON SOLAR PANELS Katie Fitzgerald Expo Project Grade 7 OBSERVATION By using a solar light instead of electricity, one can assist in lightening the load on our environment. By

More information

### 8.2 Cells and Energy. What is photosynthesis? Photosynthesis takes place in the chloroplasts. CHAPTER 8. Solar cells and chloroplasts

CHAPTER 8 CELL PROCESSES 8.2 Cells and Energy To stay alive, you need a constant supply of energy. You need energy to move, think, grow, and even sleep. Where does that energy come from? It all starts

More information

### Integrating the Solar Spectrum

Integrating the Solar Spectrum PHYS 4400, Principles and Varieties of Solar Energy Instructor: Randy J. Ellingson The University of Toledo January 24, 203 Pop Quiz Note: quiz does not count toward grade

More information

### Atomic Structure: Chapter Problems

Atomic Structure: Chapter Problems Bohr Model Class Work 1. Describe the nuclear model of the atom. 2. Explain the problems with the nuclear model of the atom. 3. According to Niels Bohr, what does n stand

More information

### PHYSICS 2150 EXPERIMENTAL MODERN PHYSICS. Lecture 6 Chi Square Test, Poisson Distribution

PHYSICS 2150 EXPERIMENTAL MODERN PHYSICS Lecture 6 Chi Square Test, Poisson Distribution LAB REPORT FORMAT Experiment title Objective : Several sentence description of scientific goal (not to learn about.

More information

### Be sure to staple your graph to the handout!

CHEM 151 EMISSION AND ABSORPTION SPECTROSCOPY Winter 2009 Fill-in Prelab attached (p 13) Stamp Here Name Partner Lecturer Be sure to staple your graph to the handout! Introduction Date You have now observed

More information