none
An outer layer of gas on a planet is called an atmosphere.
The outer layer is atmosphere.
Only Mercury and some terrestrial exoplanets.
None. By definition a rocky planet is mostly rock. Venus, by far, has the densest atmosphere of the terrestrial planets, but the planet itself is mostly rock and is similar in composition to Earth.
what is the terrestrial planet that has no atmosphere
The terrestrial planet that has no atmosphere is Mercury. Its thin atmosphere consists mainly of trace amounts of oxygen, sodium, hydrogen, helium, and potassium, and is not enough to be considered a true atmosphere.
none
Mars is the terrestrial planet with a thin carbon dioxide atmosphere. Venus also has an atmosphere of carbon dioxide, but it is very thick.
The thinnest atmosphere belongs to planet Mercury . . . it may have no atmosphere, at all.
atmosphere
An atmosphere
An atmosphere
Mars has almost no atmosphere. APEX=MERCURY has no atmosphere.
Venus
An atmosphere.
Right, it's Mercury.