1.One gram-atom of Nitrogen is heavier than one gram-atom of Oxygen. True or false

2.Measurements of a physical quantity. can be very precise but not accurate

True or False

☆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