3li 14si 2he 11na 15p which of these elements belong to be period 3
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14, 15 11 are belong to third period
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Answer:
3Li, 14He, 11Na, 15P
Electronic configuration of the following elements is:
3Li = 2,1
14He =2,8,4
11Na = 2,8,1
15P = 2,8,5
14He, 11Na, 15P belong to the third period because according to their electronic configuration, each element contains three shell i.e. K,L,M.
Explanation:
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