Atoms of which element have the greatest tendency to gain electrons

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

How hot is the suns corona? (integrated science)

What would be the original temperature of a gas that has a volume of 2.0 l and a pressure of 2.0 atm and an unknown temperature that the volume increased to 3.5 l in its pressure decreased to 1.0 atm if the final temperature is measured to be 11°c