H) elements having valence electrons 4,5,6 or 7 are called as ____________.
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is determined by the number of valence electrons in the outermost shell of the element. Bromine has atomic number 35, which means it has 7 electrons in its valence shell.
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In chemistry, a valence electron is an outer shell electron that is associated with ... For a main group element, a valence electron can exist only in the ... Group 17 (VII) (halogens), 7 .
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