NAME PERIOD DATE Chapter 6 Sec. 1 Development of the Modern Periodic Table Worksheet In the orange/black chemistry textbook titled Chemistry: Matter and Change read pages 174-181 on Section 1 Development of the Modern Periodic Table and answer the following questions as completely as possible. This worksheet will be DUE AT THE END OF CLASS TODAY. Good luck! Development of the Periodic Table 1. Who organized 33 elements into 4 categories (gases, metals, nonmetals, and earths)? 2. Which TWO events played major roles in the advancement of chemistry in the 1800s? 3. What did the industrial revolution help with in the field of chemistry? 4. How many elements were known by 1870? 5. After scientists had agreed-upon atomic masses for the elements, what TWO things did these scientists search for? 6. What did John Newlands propose AND notice in 1864? 7. What did John Newlands name his periodic relationship after noticing a pattern in the chemical properties of the elements? 8. What did John Newlands name his periodic relationship (law of octaves) after? 9. What did both Lothar Meyer and Dmitri Mendeleev demonstrate in 1869?
10. What did Dmitri Mendeleev notice (this is similar to what John Newlands noticed also) and what did he do because of what he noticed? 11. Why was Dmitri Mendeleev able to predict the properties of the yet-to-be discovered elements Scandium, Gallium, and Germanium? 12. What did Henry Moseley contribute to the developing Periodic Table in 1913? 13. What is the periodic law? 14. How did Dmitri Mendeleev and Henry Moseley differ in the way they organized the elements on the Periodic Table? 15. Complete the following table about the scientists who contributed to the classification of the elements and the Periodic Table: Scientist Dates Alive Major Contributions Antoine Lavoisier John Newlands Lothar Meyer Dmitri Mendeleev Henry Moseley
The Modern Periodic Table 16. What FOUR things do the boxes on the Periodic Table commonly contain? 17. How are the boxes on the Periodic Table arranged? 18. Which element is in group 2 and period 4? 19. Which element is in group 14 and period 6? 20. How many periods are there? 21. What is special about the elements in groups 1, 2, and 13-18 and what are they called? 22. What are the elements in groups 3-12 called? 23. In what THREE categories are elements classified in? 24. What are FIVE characteristics of metals? 25. List all of the alkali metals. In which group do the alkali metals exist? 26. Why do alkali metals usually exist as compounds with other elements? 27. List all of the alkaline earth metals. In which group do the alkaline earth metals exist? 28. Are alkali metals or alkaline earth metals highly reactive and also important for your health?
29. Fill in the missing information in the chart below: Transition Elements Transition Metals Lanthanide Series 30. Where are nonmetals found on the Periodic Table? 31. List AT LEAST THREE characteristics of nonmetals. 32. What are the elements in group 17 called and why are they often a part of a compound? 33. What are the extremely unreactive elements in group 18 called? 34. What are metalloids? Section Review 35. Explain how Mendeleev s periodic table was in error. 36. Identify each of the following elements as a representative element or a transition element. a. Lithium (Li) b. Platinum (Pt) c. Promethium (Pm) d. Carbon (C)
37. For each of the given elements, list TWO other elements with similar chemical properties (hint: elements in the same group have similar chemical properties because they have the same number of valence electrons). a. Iodine (I) b. Barium (Ba) c. Iron (Fe) 38. A company plans to make an electronic device. They need to use an element that has chemical behavior similar to that of silicon (Si) and lead (Pb). The element must have an atomic mass greater than that of sulfur (S), but less than that of cadmium (Cd). Use the Periodic Table to determine which element the company could use. 39. Identify each of the following as a metal, a nonmetal, or a metalloid. a. Oxygen b. Barium c. Germanium d. Iron 40. Identify the special name given to each of the following groups found on the Periodic Table. a. Group 1 b. Group 2 c. Group 17 d. Group 18 41. If a new halogen and a new noble gas were discovered, what would be their atomic numbers? 42. Give the chemical symbol of each of the following elements. a. A metal used in thermometers b. A radioactive gas used to predict earthquakes; the noble gas with the greatest atomic mass c. A coating for food cans; it is the metal in group 14 with the lowest atomic mass d. A transition metal that is used to make burglar-proof vaults; also the name of a coin 43. Scientists recently reported an element with 117 protons. What is its group and period? Would it be a metal, a metalloid, or a nonmetal?
44. Give the chemical symbol for each element. a. The element in period 3 that can be used in making computer chips because it is a metalloid b. The group 13, period 5 metal used in making flat screens for televisions c. An element used as a filament in light bulbs; has the highest atomic mass of the natural elements in group 6 45. Sketch a simplified periodic table, and use labels to identify the alkali metals, alkaline earth metals, transition metals, inner transition metals, noble gases, and halogens.