Which of the following correctly compares the radii of F and F−? (5 points)

Select one:
a. F has a smaller radius than F− because an additional electron causes greater repulsion in F−.
b. F has a larger radius than F− because an additional electron causes greater repulsion in F.
c. F has a smaller radius than F− because F− has an additional energy shell.
d. F has a larger radius than F− because F has an additional energy shell.