Set of chemical elements with common periodic properties, appearing as column in the periodic table
Also known as family · column of elements · periodic table group
11 statements · 27% with external sources · numbers in brackets are citations
4 identifiers linking group across the web's reference databases
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In chemistry, a group is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are not numbered. The elements in a group have similar physical or chemical characteristics of the outermost electron shells of their atoms, because most chemical properties are dominated by the orbital location of the outermost electron.