m7ik1aEbocal m7ik1aEbocal

28-09-2016
Physics

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how are the relationships of elements in a group different from the relationships of elements in a period?

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Zoya789 Zoya789

06-10-2016

elements in the same group have the same number of valence electrons on the valence energy level
elements in the same period havr the same number of energy levels

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