Question

Question 8 of 25 What happens to the atomic radius when an electron is gained? A. The negative ionic radius is the same size as the neutral atomic radius. B. The negative ionic radius is smaller than the neutral atomic radius. O C. The negative ionic radius does not follow a trend with the neutral radius. D. The negative ionic radius is larger than the neutral atomic radius. Suen​

Answer 1

The gain of an electron adds more electrons to the outermost shell which increases the radius because there are now more electrons further away from the nucleus and there are more electrons to pull towards the nucleus so the pull becomes slightly weaker than of the neutral atom and causes an increase in atomic radius.