Question

Write first 20 elements with there valency. ​

Answer 1

Answer:

) 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

Answer 2

Answer:

Element. Valency

Hydrogen. 1

Helium. 0

Lithium. 1

Beryllium. 2

Boron. 3

Carbon. 4

Nitrogen. 3

Oxygen. 2

Fluorine 1

Neon 0

Sodium. 1

Magnesium. 2

Aluminum. 3

Silicon. 4

Phosphorus. 3

Sulphur 2

Chlorine 1

Argon. 0

Potassium 1

Calcium. 2

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