Question

Valency and valence electrons of first 20 elements​

Answer 1

Answer:

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 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 :

hope it helps ❤️

Answer 2

Answer:

Answer ♡

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