Question

how will you find the valency of chlorine, sulphur and magnesium?
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Answer 1

Answer:

the number of electrons in the last shell is their valency.

chlorine - 7

Sulphur- 6

magnesium- 2

Answer 2

Explanation:

The outermost shell of the atom of an element is less than or equal to 4, then the valency of the element is equal to the number of electrons in the outermost shell.

The distribution of electrons in chlorine, sulphur, and magnesium atoms are

2, 8, 7

2, 8, 6 and

2, 8, 2

to attain stability the element has gained or shared or lost its electron to complete octet in the valence shell.

Thus,the valency of chlorine =8-7= 1

one electron is gained here so it's

valency is 1.

The valency of sulphur = 8 – 6 = 2

The valency of magnesium = 2

To be stable sulphur and magnesium gained 2 electron so it's valency is 2.