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24 December, 04:17

Difference between a row ("period") & a column ("group") on the periodic table and examples.

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  1. 24 December, 07:27
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    The rows are the one line of elements that goes from left to right horizontally. A column is a line of elements that goes vertically.
  2. 24 December, 07:44
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    Groups are number of valance electrons and periods are number of electron shells. the gtoups 13-18 have 3-8 valance electrons and groups 1 and 2 have 1 and 2 valance electrons
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