What volume is occupied by 19.6 g of methane at 27°C and 1.59atm?

Ions gain or lose electrons

☆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

Answers are 1,2,4 its correct on edgenuity.