Question

valance electrons of 1 to 20 atomic no. write on paper first answer will be Mark as brainlist​

Answer 1

Answer:

Explanation:

1) Hydrogen (H): Valence electrons : 1

2) Helium (He): , Valence electrons : 2

3) Lithium (Li): , Valence electrons : 1

4) Beryllium (Be): Valence electrons : 2

5) Boron (B):, Valence electrons : 3

6) Carbon (C): , 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 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 (Ca) : Valency: 2 , Valence electrons : 2