Which of the given elements A,B,C,D and E with atomic number 2,3,7,10 and 30 respectively belong to the same period ?

Options

A. A,B,C
B. B,C,D
C. A,D,E
D. B,D,E

Answer

B

Explanation

`2^("nd")` period contains elements with atomic number 3(Li), 7(N), 10 (Ne). Since, `2^("nd")` period has elements having atomic number 3 to 10.