非ひ共きょう有ゆう電でん子し対つい

noun

unshared electron pair; lone pair

Chemistry term for a pair of valence electrons not involved in bonding. Often contrasted with 共有電子対 (shared electron pair).

See also: 孤立電子対

• アンモニア分ぶん子しの窒ちっ素そ原げん子しには非ひ共きょう有ゆう電