Question

How many valence electrons are in atom of radon?

Answer 1

Radon is a Noble Gas found in the 6th energy level (row) of the periodic table. Noble Gases, re in the 18th column, Group VIIIA.
This means Radon will end in a electron configuration of `6p^6`.

The Noble Gas (core) notation for Radon is

`[Xe] 6s^2 4f^14 5d^10 6p^6`

The valence level, (highest energy level s and p orbitals) is `6s^2 6p^6`

Radon has eight valence electrons. Like all Noble Gases, Radon is considered stable with a complete octet of electrons, filling the s and p orbitals.

I hope this was helpful.
SMARTERTEACHER