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The elements that belong to the third period of periodic ...

The elements that belong to the third period of periodic table are

A.

Li, Be, Al and D

B.

Na, P, O and Cl

C.

B, C, N, and O

D.

Na, Mg, S and Ar

View answer & explanation

Correct answer is D

Na, Mg, S and Ar is the set of elements that belong to third period of the periodic table. Option A,B,C have elements which belong to the other period in the periodic table included in them.

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