Chapter 2 Pre-Test sections 2.1-2.7

In the periodic table the rows are called and the

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19. In the periodic table, the rows are called _____ and the columns are called _____. a. octaves, groups b. staffs, families c. periods, groups d. cogeners, families e. rows, groups
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20. Which one of the following is a nonmetal? 21. Which pair of elements below should be the most similar in chemical properties? 22. Calcium is a _____ and silver is a _____. 23. __________ are found uncombined, as monatomic species in nature. a. Noble gases b. Chalcogens c. Alkali metals d. Alkaline earth metals e. Halogens 24. Which one of the following molecular formulas is also an empirical formula? 25. The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is __________.
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26. __________ and __________ are isotopes of the same element. 27. Of the following, _________ contains the greatest number of electrons. a. P 3+ b. P c. P 2- d. P 3- e. P 2+ 28. There are _____ protons, _____ neutrons, and _____ electrons in the ion 90 Sr 2+ . 29. Which species is an isotope of 39 Cl? 30. The most metallic elements would be found at the bottom of which group?
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Honors Chemistry Chapter 2.1-2.6 Review 1. c 2. b 3. b 4. e 5. d 6. a 7. d 8. c 9. e 10. d 11. b 12. a 13. a 14. e 15. a 16. e 17. d 18. b 19. c 20. e 21. c 22. b 23. a 24. b 25. d 26. a 27. d 28. a 29. c 30. a
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