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Nylah Benjamin
Mathematics
22 August, 00:43
Why are the elements placed into groups/families?
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Camille Trujillo
22 August, 01:05
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The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
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