The outer shell configuration and group number of the element with atomic number 107 is

Options

A. `7s^(2),7`
B. `6s^(2),2`
C. `7s^(2)7p^(2),7`
D. `7s^(1),15`

Answer

A

Explanation

The electronic configuration for atomic number 107 is `[Rn] 5f^(4)6d^(5)7s^(2)`. Thus, it has outer shell configuration`7s^(2)` and its group number is 5+2=7