A sample of nitrogen gas is at a pressure of 1.20 atm, a volume of 30.0 liters, and a temperature of
87.0 OC. How many moles of gas are in the sample? How many grams of gas are in the
sample?

☆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