Why the elements are periodically classified
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Explanation:
The elements in each group have the same number of valence electrons, making them react similarly when they gain or lose electrons to other atoms. The electron shells increase in size, causing the increasing period size of the periodic table.
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3
Answer:
The elements in each group have the same number of valence electrons, making them react similarly when they gain or lose electrons to other atoms. The electron shells increase in size, causing the increasing period size of the periodic table.
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