A n = 2 to n = 1. B n = 3 to n = 1. C n = 4 to n = 2. D n = 5 to n = 2

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1 North arolina Testing Program EO hemistry Sample Items Goal 4 1. onsider the spectrum for the hydrogen atom. In which situation will light be produced? 3. Which color of light would a hydrogen atom emit when an electron changes from the n = 5 level to the n = 2 level? Electrons absorb energy as they move to an excited state. Electrons release energy as they move to an excited state. red yellow green Electrons absorb energy as they return to the ground state. blue Electrons release energy as they return to the ground state. 2. Which statement regarding red and green visible light is correct? 4. What energy level transition is indicated when the light emitted by a hydrogen atom has a wavelength of 103 nm? n = 2 to n = 1 The speed of green light is greater than that of red light. The wavelength of green light is longer than that of red light. The energy of green light is lower than that of red light. The frequency of green light is higher than that of red light. n = 3 to n = 1 n = 4 to n = 2 n = 5 to n = 2 Page 1

2 North arolina Testing Program EO hemistry Sample Items Goal 4 5. piece of metal is heated in a unsen burner flame and then immersed in a beaker of cool water. 6. The gases helium, neon, and argon are in separate containers at 55. Which is true about the kinetic energy of the gases? Which statement best describes the effect of the temperature changes on the kinetic energy of the particles? Kinetic energy of metal atoms decreases in the flame. Helium has the lowest mass and therefore greatest kinetic energy. They each have a different kinetic energy. rgon has the greatest mass and therefore the greatest kinetic energy. They all have the same average kinetic energy. Kinetic energy of water molecules increases when the heated metal is immersed. 7. This is a heating curve for a substance. Kinetic energy of water molecules decreases when the heated metal is immersed. Kinetic energy of metal atoms increases when immersed in the cooler water. X Y Heat (kj per 100 g) etween points X and Y, which would be observed? Solid and liquid will be present. Only vapor will be present. Liquid and vapor will be present. Only liquid will be present. Page 2

3 North arolina Testing Program EO hemistry Sample Items Goal 4 8. n open container of water is brought to a boil and heated until all of the water is converted to water vapor. Which describes the changes in the water molecules? The molecules speed up and move farther apart. The molecules speed up and move closer together. 11. How many grams of ice will melt at 0 if the ice absorbs 420. J of energy? g g 1.26 g g The molecules slow down and move farther apart. The molecules slow down and move closer together. 12. n 18.0-g piece of an unidentified metal was heated from 21.5 to If 292 J of heat energy was absorbed by the metal in the heating process, what was the identity of the metal? g of gold was heated from 20.0 to How much heat was applied to the gold? Substance Specific Heat Table Specific Heat 1.55 J luminum 0.90 J/g 15.5 J alcium 0.65 J/g 17.0 J 32.5 J opper Gold Iron 0.39 J/g 0.13 J/g 0.46 J/g Mercury 0.14 J/g 10. student has a beaker containing 55 g of water at 100. How much heat is needed to convert the water to steam? Silver calcium 0.24 J/g 120,000 J copper 18,000 J iron 2,200 J silver 330 J Page 3

4 North arolina Testing Program EO hemistry Sample Items Goal This graph represents the change in energy for two laboratory trials of the same reaction. Energy Profile Reaction Pathway Which factor could explain the energy difference between the trials? Heat was added to trial #2. catalyst was added to trial #2. Trial #1 was stirred. Trial #1 was cooled. Page 4

5 North arolina Testing Program EO hemistry Sample Items Goal onsider this phrase diagram. Phase iagram X Y Temperature ( ) 150 What process is occurring when a substance changes from point X ( 130 and 50 kpa) to point Y (30 and 100 kpa)? boiling freezing melting sublimation 15. When a chemical cold pack is activated, it becomes cool to the touch. What is happening in terms of energy? n exothermic reaction is occurring, absorbing cold from its surroundings. n exothermic reaction is occurring, releasing heat to its surroundings. n endothermic reaction is occurring, releasing cold to its surroundings. n endothermic reaction is occurring, absorbing heat from its surroundings. Page 5

6 North arolina Testing Program EO hemistry Sample Items Goal onsider this diagram: Source of alpha, beta, and gamma radiation paper wood Which of the three types of radiation will penetrate the paper and wood? alpha, beta, gamma alpha and beta only gamma only beta only 17. The half-life of phosphorus-32 is days. How many milligrams of a mg sample of phosphorus-32 will remain after days? 18. In the figure below, what type of nuclear activity is represented? mg mg U 87 35r mg mg La fission fusion alpha emission beta emission Page 6

7 North arolina Testing Program EO hemistry Sample Items Goal Which particle will complete this reaction? electron neutron o +? o Which will complete this equation? 0 e 1 0 γ 0 U Th nucleus 1 H 1 proton 4 He 2 End of Goal 4 Sample Items In compliance with federal law, including the provisions of Title IX of the Education mendments of 1972, the epartment of Public Instruction does not discriminate on the basis of race, sex, religion, color, national or ethnic origin, age, disability, or military service in its policies, programs, activities, admissions or employment. Page 7

8 EO hemistry Goal 4 Sample Items Key Report 1 Objective: 4.01 nalyze the ohr model in terms of electron energies in the hydrogen atom. a. The spectrum of electromagnetic b. Emission and absorption of electromagnetic energy as electrons change energy levels. Thinking Skill: pplying orrect nswer: 2 Objective: 4.01 nalyze the ohr model in terms of electron energies in the hydrogen atom. a. The spectrum of electromagnetic b. Emission and absorption of electromagnetic energy as electrons change energy levels. Thinking Skill: pplying orrect nswer: 3 Objective: 4.01a nalyze the ohr model in terms of electron energies in the hydrogen atom. a. The spectrum of electromagnetic energy. Thinking Skill: nalyzing orrect nswer: 4 Objective: 4.01 nalyze the ohr model in terms of electron energies in the hydrogen atom. a. The spectrum of electromagnetic b. Emission and absorption of electromagnetic energy as electrons change energy levels. Thinking Skill: nalyzing orrect nswer: 5 Objective: 4.02 nalyze the law of conservation of energy, energy transformation, and various forms of. ifferentiate between heat and b. nalyze heating and cooling c. alorimetry, heat of fusion and heat of vaporization iagrams (energy vs. reaction pathway), enthalpy and activation energy. Thinking Skill: pplying orrect nswer: 6 Objective: 4.02 nalyze the law of conservation of energy, energy transformation, and various forms of. ifferentiate between heat and b. nalyze heating and cooling c. alorimetry, heat of fusion and heat of vaporization iagrams (energy vs. reaction pathway), enthalpy and activation energy. Thinking Skill: pplying orrect nswer: Page 1 educational purposes only; not for personal or financial gain.

9 EO hemistry Goal 4 Sample Items Key Report 7 Objective: 4.02 nalyze the law of conservation of energy, energy transformation, and various forms of. ifferentiate between heat and b. nalyze heating and cooling c. alorimetry, heat of fusion and heat of vaporization iagrams (energy vs. reaction pathway), enthalpy and activation energy. Thinking Skill: nalyzing orrect nswer: 8 Objective: 4.02 nalyze the law of conservation of energy, energy transformation, and various forms of. ifferentiate between heat and b. nalyze heating and cooling c. alorimetry, heat of fusion and heat of vaporization iagrams (energy vs. reaction pathway), enthalpy and activation energy. Thinking Skill: pplying orrect nswer: 9 Objective: 4.02 nalyze the law of conservation of energy, energy transformation, and various forms of. ifferentiate between heat and b. nalyze heating and cooling c. alorimetry, heat of fusion and heat of vaporization iagrams (energy vs. reaction pathway), enthalpy and activation energy. Thinking Skill: pplying orrect nswer: 10 Objective: 4.02 nalyze the law of conservation of energy, energy transformation, and various forms of. ifferentiate between heat and b. nalyze heating and cooling c. alorimetry, heat of fusion and heat of vaporization iagrams (energy vs. reaction pathway), enthalpy and activation energy. Thinking Skill: pplying orrect nswer: 11 Objective: 4.02 nalyze the law of conservation of energy, energy transformation, and various forms of. ifferentiate between heat and Page 2 educational purposes only; not for personal or financial gain.

10 EO hemistry Goal 4 Sample Items Key Report b. nalyze heating and cooling c. alorimetry, heat of fusion and heat of vaporization iagrams (energy vs. reaction pathway), enthalpy and activation energy. Thinking Skill: pplying orrect nswer: 12 Objective: 4.02 nalyze the law of conservation of energy, energy transformation, and various forms of. ifferentiate between heat and b. nalyze heating and cooling c. alorimetry, heat of fusion and heat of vaporization iagrams (energy vs. reaction pathway), enthalpy and activation energy. Thinking Skill: nalyzing orrect nswer: 13 Objective: 4.03 ssess reaction rates and factors that affect reaction rates. Thinking Skill: pplying orrect nswer: 14 Objective: 4.01 nalyze the ohr model in terms of electron energies in the hydrogen atom. a. The spectrum of electromagnetic b. Emission and absorption of electromagnetic energy as electrons change energy levels. Thinking Skill: nalyzing orrect nswer: 15 Objective: 4.02 nalyze the law of conservation of energy, energy transformation, and various forms of. ifferentiate between heat and b. nalyze heating and cooling c. alorimetry, heat of fusion and heat of vaporization iagrams (energy vs. reaction pathway), enthalpy and activation energy. Thinking Skill: Knowledge orrect nswer: 16 Objective: 4.04 nalyze nuclear energy.. Radioactivity: characteristics of alpha, beta and gamma b. ecay equations for alpha and beta c. Half-life and fission and d. Fission and fusion. Thinking Skill: nalyzing orrect nswer: Page 3 educational purposes only; not for personal or financial gain.

11 EO hemistry Goal 4 Sample Items Key Report 17 Objective: 4.04 nalyze nuclear energy.. Radioactivity: characteristics of alpha, beta and gamma b. ecay equations for alpha and beta c. Half-life and fission and d. Fission and fusion. Thinking Skill: pplying orrect nswer: 18 Objective: 4.04 nalyze nuclear energy.. Radioactivity: characteristics of alpha, beta and gamma b. ecay equations for alpha and beta c. Half-life and fission and d. Fission and fusion. Thinking Skill: nalyzing orrect nswer: 19 Objective: 4.04 nalyze nuclear energy.. Radioactivity: characteristics of alpha, beta and gamma b. ecay equations for alpha and beta c. Half-life and fission and d. Fission and fusion. Thinking Skill: nalyzing orrect nswer: 20 Objective: 4.04 nalyze nuclear energy.. Radioactivity: characteristics of alpha, beta and gamma b. ecay equations for alpha and beta c. Half-life and fission and d. Fission and fusion. Thinking Skill: nalyzing orrect nswer: Page 4 educational purposes only; not for personal or financial gain.

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