Question

A neutral atom of Fluorine has seven valence electrons. How many valence electrons are present in the ion F-1?

Answer 1

8 valence electrons

Step-by-step explanation:

Fluoride is F^-, so it has one additional electron, which is expected to be in a valence level (completing a closed-shell inert-gas structure). Thus fluoride should be 1s^2,2s^2,2p^6 , and have 8 valence electrons.