While there are traces of metals like iron and nickel in the moon's core, the vast majority of its composition is made up of:

* Silicates: These are minerals that contain silicon and oxygen, and make up most of the moon's crust and mantle.

* Oxide: This is a compound of oxygen and another element, like iron oxide (rust).

* Other elements: In smaller amounts, the moon also contains elements like aluminum, magnesium, calcium, and titanium.

The moon does have a very thin atmosphere, but it's so incredibly thin that it's practically negligible and doesn't significantly contribute to the moon's composition.