Question

How many unpaired electrons are in a radon atom?

Answer 1

None.

Explanation:

There are no unpaired electrons in a radon atom or any atom of the noble gases. The atomic number of radon is `76`, which means that a neutral atom would also contain `76` electrons.

The noble gas shorthand electron configuration is `["Xe"]4"f"^14"5d"^10"6s"^2"6p"^6"`. All of the energy sublevels are filled to the point of `"6s"^2"6p"^6"`.