Question

atomic number of few elements for 1018 714 option identify the element​

Answer 1

Answer:

Atomic number of a few elements are given below:

 

10, 20, 7, 14

Identify the period to which these elements belong?

A    2,4,2,3

B    3,2,3,2

C    2,2,3,3

D    3,3,2,2