Indicate the number of unpaired electrons present in Kr Atom...?
0 unpaired. (All are paired.)
To determine the number of unpaired electrons in a Kr atom, we need to look at its electron configuration.
The atomic number of Kr is 36, which means it has 36 electrons. The electron configuration of Kr is:
1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6
We can see that all the orbitals up to 4p are completely filled. Therefore, there are no unpaired electrons in the 4s, 3d, or 4p orbitals.
Hence, the Kr atom has zero unpaired electrons.