Question

Let us suppose that you have discovered a new element of the atomic number $162$, which you choose to name khalidium (Kh). Assume that the normal order of filling of orbitals still prevails in the eighth period.

The new type of orbital used in Kh that is not used in any known atom is:

• A. h
• B. d
• C. f
• D. g

Answer 1

The correct option is D g

Electronic configuration of Kh would be as follows:

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{10}5p^{6}6s^{2}4f^{14}5d^{10}6p^{6}7s^{2}5f^{14}6d^{10}7p^{6}8s^{2}5g^{18}6f^{14}7d^{10}$
For atomic number 162, the new type of orbital can be used is "g" that has never been used to write electronic configuration of existing atom in the periodic table.
Option D is correct.