Question

define symbol and valency?
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Answer 1

Explanation:

A chemical symbol denotes in short, a particular element or an atom of that element. ... Valency is the combining capability of an element. In other words, the number of electrons which an atom can gain or share or lose when a chemical reaction takes place defines its valency.

Answer 2

Answer:

A chemical symbol denotes in short particular element or an atom of that element.

Valency is the combining capability of an element,In other words the number of electrons which an atom can gain or share or lose when a chemical reaction takes place defines it valency....