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Question

Identify the group and period of the element with atomic number 12.

A
IA, third
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B
IIIA, third
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C
IIA, third
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D
IIA, second
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Solution

The correct option is B IIA, third
The electronic configuration of the element with atomic number 12 is 1s22s22p63s2.

The number of valence electrons =2, which means it belongs to group II A.

The valence shell is 3, which means it belongs to the third period.

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