Question

An element has 5 electrons in M shell.Find out its atomic number?​

Answer 1

Explanation:

If the element has 5 electrons in the M shell, it is in the 3rd period of Periodic Table and 15th group. The element in 3rd period and 15th group is Phosphorous. Hence "X" is Phosphorous (P).

Answer 2

Explanation:

If the elements has selectrons in the M shell, it is in the 3rd period and is the group is phosphorus . Hence "X" is phosphorus