The moon's thin atmosphere is made by constant meteorite bombardment

[Admin]

New research using Apollo mission samples has determined that the impact of meteorites on the lunar surface is primarily responsible for generating the moon's thin and nebulous atmosphere.

The moon's thin atmosphere is made by constant meteorite bombardment : Read more

 

[Torbjorn Larsson]

the number of protons can't vary when changing the element to another element

The proton number is the same for all isotopes of an element, but differ between elements.