Find the period and group of the element whose atomic number is 12.
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As the no. of valence shells is 3 (K=2 , L=8, M=2) the period no. is 3
As the no. of valence electrons is 2 the group no. is 2.
As the no. of valence electrons is 2 the group no. is 2.
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3rd period, 2nd group
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