elements with seven electron in the valance electrons are
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The family of elements having seven electrons in the valence shell is halogens, i.e., chlorine, fluorine, bromine, iodine, astatine.
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the elements in this family are florine,chlorine,bromine,iodine,and astatine. Halogens have 7valence electrons, which explains why they are the most active non - metels
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