An element with electronic configuration 2,8,2 belongs to which period and group?
A
2,3
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B
4,3
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C
2,1
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D
3,2
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Solution
The correct option is D3,2 Element with electronic configuration 2,8,2 belongs to 3rd period and 2nd group. The valence electrons give us the idea of group numbers. As the electrons are divided into 3 different shell therefore the period number is 3.