Agas occupies a volume of 1.50 L at 200°C. The gas expands under constant pressure to 5 L. What is the new temperature?

Particle exchange energy though elastic collision , hope this .

☆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

Bthats what im doing to and i figured it out it is b