Question

explain valency of first 20 elements​

Answer 1

Answer:

The Valency and valence electrons of the first 20 elements are - 1) Hydrogen (H) Valency : +- 1 , Valence electrons : 1. 2) Helium (He) Valency : 0 , Valence electrons : 2.

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Answer 2

Answer:

The Valency and valence electrons of the first 20 elements are -

1) Hydrogen (H)  

Valency : +- 1 , Valence electrons : 1

2) Helium (He)  

Valency : 0 , Valence electrons : 2

3) Lithium (Li)  

Valency : +1 , Valence electrons : 1

4) Beryllium (Be)  

Valency : +2 , Valence electrons : 2

5) Boron (B)  

Valency : +3 , Valence electrons : 3

6) Carbon (C)  

Valency : 4 , Valence electrons : 4

7) Nitrogen (N)  

Valency: -3 , Valence electrons : 5

8) Oxygen (O)  

Valency: -2 , Valence electrons : 6

9) Fluorine (F)  

Valency: -1 , Valence electrons : 7

10) Neon (Ne)  

Valency: 0 Valence electrons : 8

11) Sodium (Na)  

Valency : +1 , Valence electrons : 1

12) Magnesium (Mg)  

Valency : +2 , Valence electrons : 2

13) Aluminium (Al)  

Valency : +3 , Valence electrons : 3

14) Silicon (Si)  

Valency : 4 , Valence electrons : 4

15) Phosphorous (P)  

Valency: -3 ( also 3 and 5 ),Valence electron: 5

16) Sulphur (S)  

Valency: -2 , Valence electrons : 6

17) Chlorine (Cl)  

Valency: -1 , Valence electrons : 7

18) Argon (Ar)  

Valency: 0 , Valence electrons : 8

19) Potassium (K)  

Valency : +1 , Valence electrons : 1

20) Calcium : +2 , Valence electrons : 2