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periodic table review answers

1. 2

2. 4

3. 4

4. 1

5. 4

6. 1

7. 2

8. 1

9. 4

10. 3

11. 4

12. 4

13. 1

14. 1

15. 1

16. 1

17. 3

18. 2

19. 4

20. 2

21. 1

22. 3

23. 1

24. 4

25. 2

26. 1

27. 3

28. 4

29. 4

30. 3

31. Na+ has one less principle energy level than K+, therefore the valence shell is closer to the nucleus.

32. The radius increases because there are more electrons pulling against the same number of protons (effective nuclear charge).

33. -2

34. Na and Rb.

35. Elements in the same group, such as Na and Rb in group 1, have similar properties because they have the same number of valence 

      electrons.

 

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