Question

name the element from 1 to 20 with atomic numbers and valency

Answer 1

Element,Valency
1.HYDROGEN,1
2.HELIUM,0
3.LITHIUM,1
4.BERELIUM,2
5.BORON,3
6.CARBON,4
7.NITROGEN,3
8.OXYGEN,2
9.FLOURINE,1
10.NEON,0
11.SODIUM,1
12.MAGNESIUM,2
13.ALUMINIUM,3
14.SILICON,4
15.PHOSPOROUS,3
16.SULPHUR,2
17.CHLORINE,1
18.ARGON,0
19.POTASSIUM,1
20.CALCIUM,2

Answer 2

Atomic no. Name. Valency

1. Hydrogen. 1

2. Helium. 0

3. Lithium. 1

4. Beryllium. 2

5. Boron. 3

6. Carbon. 4

7. Nitrogen. 3

8. Oxygen. 2

9. Fluorine. 1

10. Neon. 0

11. Sodium. 1

12. Magnesium 2

13. Aluminium. 3

14. Silicon. 4

15. Phosphorus 3

16. Sulphur. 2

17. Chlorine. 1

18. Argon. 0

19. Pottasium 1

20. Calcium. 2