Question

give me electronic configuration.. from 1 to 20( with valency)​

Answer 1

Check the attachment for answer

Answer 2

1. H ( Hydrogen) 1
valency - 1

2. He ( helium) 2
Noble gas....

3. Li ( lithium) 2 , 1
valency- 1

4. Be ( beryllium) 2 , 2
valency- 2

5. B ( boron) 2 ,3
valency- 3

6. C ( carbon ) 2,4
Valency-4

7.N ( nitrogen) 2,5
valency- 3

8. O ( oxygen) 2,6
valency- 2

9. F ( flourine) 2,7
valency- 1

10.Ne ( neon) 2,8
Noble gas....

11. Na ( sodium ) 2,8,1
Valency- 1

12.Mg ( magnesium) 2,8,2
valency- 2

13.Al ( aluminium) 2,8,3
valency- 3

14. Si ( silicon) 2,8,4
valency- 4

15.P ( phosphorus) 2,8,5
Valency- 3

16.S ( sulphur) 2,8,6
valency- 2

17. Cl ( chlorine) 2,8,7
valency- 1

18.Ar ( argon) 2,8,8
Noble gas.....

19.K ( potassium) 2,8,8,1
Valency- 1

20. Ca ( calcium) 2,8,8,2
valency- 2

Hope it helps...

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