What is the air like on Mercury?

Answer 1

Mercury does not have much of an atmosphere as its gravity is too weak to keep one.

However it does have a very unstable tenuous one containing hydrogen, helium, oxygen, sodium, calcium and potassium.

So far, observations of Mercury from ground-based observers and the Mariner 10 spacecraft have not shown evidence of a significant atmosphere compared to other planets. Mariner 10 did observe a tiny amount of helium 1000 km above the surface, but this is probably caused by the solar wind and the breakdown of Mercury's crust. Sodium, potassium and oxygen have also been detected in Mercury's very weak atmosphere, but these elements can be lost when they react with the Sun and Mercury's magnetic field.

mercury has almost no atmosphere only a thin layer of helium and sodium gas.

There is no air on Mercury because Mercury has no atmosphere (meaning no air).

Quote from the website below: "Mariner 10 did observe a tiny amount of helium 1000 km above the surface, but this is probably caused by the solar wind and the breakdown of Mercury's crust. Sodium, potassium and oxygen have also been detected in Mercury's very weak atmosphere, but these elements can be lost when they react with the Sun and Mercury's magnetic field."

No, because it lacks oxygen. So this means that their isn't enough oxygen to breathe on Mercury. This also means that it cannot support life.

mercury does not have an atmosphere