Question

Number of completely filled orbitals in xenon atom $(Xe)$ is

• A. 17
• B. 18
• C. 27
• D. 28

Answer 1

Answer: (C)

The electronic configuration of xenon having atomic number $54$ is given as:

${}_{54}Xe=1s^2,2s^{2}2p^6,3s^{2}3p^{6}3d^{10},4s^{2}4p^{6}4d^{10},5s^{2}5p^6$

Thus the number of completely filled orbital in xenon atom $(Xe)$ is $27$ .