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What should be the atomic number of the ...

What should be the atomic number of the next inert gas if discovered in future ?

A

115

B

119

C

118

D

121

Text Solution

Verified by Experts

The correct Answer is:
C
The next halogen will have `7s^(2)7p^(5)` outer configuration. Since, the filling of 7-orbitals will begin after `5f` and `6d-`orbitals, thus the atomic number of the new halogen will be 112 (up to the filling of 6d-orbitals) plus 5, i.e., 117.
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