Help please it's for my final rn: The more massive the planet the more it has.
-Volume
-Inertia
-Gravity
-Momentum

Typically, the more massive the planet, the more massive the atmosphere it can acquire and maintain.

Explanation:

But a planet's size is not necessarily proportional to its mass. In the end, how massive a planet is has more to do with its composition and density. So while a planet like Mercury may be smaller in size than Jupiter's moon Ganymede or Saturn's moon Titan, it is more than twice as massive than they are.

geologic time scale (for gradpoint) =)