Define valency
Solution
Valency, in chemistry, is a measure of the ability of an atom to form bonds with other atoms. It is determined by the number of electrons in the outermost shell of an atom that can be used for bonding. For example, hydrogen has a valency of 1 because it has one electron in its outermost shell that can be used for bonding. Oxygen has a valency of 2 because it has two electrons in its outermost shell that can be used for bonding. The concept of valency is fundamental to understanding the structure and reactivity of molecules.
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