The amount of gas (in terms of moles, mass, and
molecules)

☆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

The answer is 4 i don't know if its right let me see.

Idon't know hope someone you