Number of completely filled orbitals in xenon atom $(\mathrm{Xe})$ is
Number of completely filled orbitals in xenon atom $(\mathrm{Xe})$ is
17
18
27
28
Solution
The electronic configuration of xenon having atomic number 54 is given as:
$
{ }_{54} \mathrm{Xe}=1 s^2, 2 s^2 2 p^6, 3 s^2 3 p^6 3 d^{10}, 4 s^2 4 p^6 4 d^{10}, 5 s^2 5 p^6
$
Thus, the number of completely filled orbital in xenon atom $(\mathrm{Xe})$ is 27