Can anyone help me with the second part!

Rn in the right answer

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts