Definition, Meaning & Synonyms
valence electron
noun
/ˈveɪ.ləns ɪˈlek.trɒn/
Definition
A valence electron is an electron in the outermost shell of an atom that can participate in the formation of chemical bonds with other atoms.
Examples
- In sodium, there is one valence electron in its outer shell, which makes it highly reactive.
- The valence electrons of oxygen are involved in forming covalent bonds with hydrogen in water (H₂O).
Meaning
Valence electrons are important in determining how an atom can bond with other atoms and how it behaves in chemical reactions.
Synonyms
- outer electron
- bonding electron
