Question

write down 20 molecules and find out their mass​

Answer 1

Answer:

1. H → 1
2. He→4
3. Li→7
4. Be→9
5. B→11
6. C→12
7. N→14
8. O→16
9. Fl→19
10. Ne→20
11. Na→23
12. Mg→24
13. Al→27
14. Si→28
15. P→31
16. S→32
17. Cl→35.5
18. Ar→40
19. K→39
20. Ca→40