Periodic table groups names chemistry3/29/2024 There are three ways of numbering the groups of the periodic table, one using Hindu-Arabic numerals and the other two using Roman numerals. The modern explanation of the pattern of the periodic table is that the elements in a group have similar configurations of the outermost electron shells of their atoms: as most chemical properties are dominated by the orbital location of the outermost electron. There are 18 groups in the standard periodic table. Ī group, also known as a family, is a vertical column in the periodic table of the chemical elements.
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