Question

First 20elements that are under anion

Answer 1

Anion-: Nitrogen, Oxygen, Fluorine, sulphur, chlorine

hope it helps

Answer 2

1. N

2. O

3. F

4. P

5. S

6. Cl

7. Zn

8. Ga

9. Ge

10. As

11. Se

12. Br

13. Mo

14. Ag

15. In

16. Sn

17. Sb

18. I

19. Hf

20. Ta

These are the first 20 elements which exist in anion form (even if it's highly reactive, very hard or nearly impossible to maintain at that condition).