Univalent

The term univalent or monovalent describes atoms with one valence electron, i.e. a valency of 1. In simpler terms, this corresponds to an atom with one electron in its outermost orbital. All elements in the first group (group IA) are an example of this, for example hydrogen and sodium.

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Atoms: REDIRECT Atom...

Valence electron: In chemistry, valence electrons are the electrons contained in the valence shell (the outermost electron level) of an atom, and which are likely to participate in a chemical reaction through bonding with other atoms, molecules, or ions....

Valency: valency has a specific meaning in:...