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.