Question

write a note on valency
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Answer 1

Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell. The noble gases have the valency 0 as they do not usually combine with other elements.

Answer 2

Answer:

SIGNIFICANCE OF VALENCE ELECTRONS:-

Those electrons present in the outermost shell of an atom and take part in chemical reaction are known as Valence Electrons.

The significance is that, they are responsible for determining the chemical behaviour of an atom.

VALENCY : -

when atoms of one element combines with the atom of another element to form a compound, they do so in fixed number depending upon the capacity use of the sum to form bonds, it is known as Valency.