Which is the only subatomic particle that can freely move on or off an atom?

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules