Answer:
The combining capacity of an atom is known as its valency. The number of bonds that an atom can form as part of a compound is expressed by the valency of the element. We all know how electrons in an atom are arranged in shells/orbitals
The modern definition of valency is the number of valence electrons it has that participate in chemical reactions is valency. A chemical compound is formed when two or more components combine in a specific mass proportion
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