The Valence shell electronic configuration of C,N and H are He2s²2P², He2S²2P³ and 1S² respectively.
Valence measures how many electrons an atom must receive or lose to reach the Valence shell electronic configuration of the nearby noble gas or inert gas. Valence electrons are the empty electrons in the outer shells of atoms.
Due to their higher energy content compared to electrons in inner orbits, valence electrons participate in chemical processes. The amount of valence electrons in an element also influences its chemical characteristics, including its valence or valency and the ability to form bonds with other elements. It also reveals the quantity of unpaired electrons, the number of atoms that can participate, and how easily bonds can form between atoms.
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