Answer:
the mass of a planet doesn't matter, considering many
planets are made up of gas, and how in different situations,
atmospheres can be destroyed (The Sun burnt off Mercury's
Atmosphere). However, in some cases, the planet can be in a good
situation on the galaxic map, and have great conditions for an
atmosphere, such as Earth. In which case, the mass of an object can
attract a smaller object, causing gravity. Therefore, the bigger
the mass of a planet when in right and specific conditions, the
more atmosphere it can attract, if there is any floating by the
planet.
If it is bigger it will have more gravitational influence and
therefore gather more gases.
Explanation:
hope this helped!
