13destinylandin 13destinylandin

21-10-2016
Physics

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Why are atoms arranged in periods ...???

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PrinceDavid PrinceDavid

21-10-2016

A horizontal row in the periodic table, which signifies the total number of electron shells in an element's atom. A vertical column in the periodic table, which signifies the number of valence shell electrons in an element's atom.

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21-10-2016

For classification, according to number of shells......

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