[Solved] is the number of shells for elements of the 3rd period.

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Q.	is the number of shells for elements of the 3rd period.
A.	"2"
B.	"1"
C.	"0"
D.	"3"
Answer» C. "0"
Explanation: The third period of the periodic table consists of the elements whose atoms has three shells occupied by electrons in its Ground State (when it is not excited or in a reaction).

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