Which of the following correctly compares the radii of F and F-?

F has a smaller radius than F - due to an additional electron that causes greater repulsion in F-

Explanation:

F is a non-metal in a group of the periodic table called halogens. F reacts by gaining electrons to form a negatively charged ion F - which has an additional electron. Atomic radius is the radius of an atom such an F atom while the ionic radius is the radius of an ion formed when an atom gains or loses electron (s). The atomic radius of F is smaller than the ionic radius of F - due to the presence of an additional electron in F - which increases the repulsion and decreases the attraction by the nucleus.