Question

valency of periodic table elements 1 to 20 with full explanation​

Answer 1

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Answer 2

Answer:

1- Hydrogen- Atomic number :1, valency: -1 or +1

2- Helium - Atomic number:2, valency: 0

3- Lithium - Atomic number:3, valency: +1

4- Beryllium - Atomic number: 4, valency: +2

5- Boron - Atomic number:5, valency: +3, -3

6- Carbon - Atomic number:6, valency: +2, +4

7- Nitrogen - Atomic number:7, valency: -3, -2, -1, (+1), +2, +3, +4, +5

8- Oxygen - Atomic number: 8, valency: -2

9- Fluorine - Atomic number:9, valency: -1, +1

10- Neon - Atomic number:10, valency: 0

11- Sodium - Atomic number: 11, valency: +1

12- Magnesium - Atomic number: 12, valency: +2

13- Aluminium - Atomic number: 13, valency: +3

14- Silicon - Atomic number: 14, valency: -4, (+2), +4

15- Phosphorus - Atomic number: 15, valency: -3, +1, +3, +5

16- Sulfur - Atomic number: 16, valency: -2, +2, +4, +6

17- Chlorine - Atomic number: 17, valency: -1, +1, (+2), +3, (+4), +5, +7

18- Argon - Atomic number: 18, valency: 0

19- Potassium - Atomic number: 19, valency: +1

20- Calcium - Atomic number: 20, valency: +2

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