Question

HELP ME PLS

Find the valence electrons for the following elements:
1. Gallium
2. Beryllium
3. Cesium
4. Rubidium
5. Calcium
6. Mg
7. K
8. Ba
9. Sr
10. AI
11. Radon
12.1
13. Sulfur
14. O
15. Argon
16. Phosphorous
17. Se
18. Bromine
19. Fluorine
20. CI

Answer 1

Valency of

2. 2.

5.2

20.1

19.1

13.2

15.0

16.3

7.1

14.2

6.2