Define valency and explain how it is related to the electron configuration of an atom.
ChemistryClass 9CBSEAnswered 12 May 2026
Answer
Valency is the combining capacity of an element, indicating the number of electrons an atom will gain, lose, or share to achieve a stable electron configuration (usually a full outermost shell). It is determined by the number of electrons in the outermost shell (valence electrons); atoms tend to react to achieve an octet (or duet for hydrogen/helium).
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