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keemilise elemendi rühma number perioodilisustabelis; A-rühmade elementidel võrdub väliskihi elektronide arvuga elemendi aatomis
номер группы . Koolisõnastikud 2005–2010. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kool_KV/%D0%BD%D0%BE%D0%BC%D0%B5%D1%80%20%D0%B3%D1%80%D1%83%D0%BF%D0%BF%D1%8B/1/rus (26.08.2026)
