Yes
Because, like Earth, Venus, and Mars, it is largely composed of rock. The giant outer planets: Jupiter, Saturn, Uranus and Neptune are largely composed of gases.
pluto's atmoshpere
Mercury has a very thin atmosphere composed mostly of Helium and Hydrogen with trace amounts of Oxygen.
The Jovian planets (Jupiter, Saturn, Uranus and Neptune) are composed of gases and pressurized liquids. Whereas, the four inner terrestrial planets (Mercury, Venus, Earth and Mars) are composed of rock and iron.
Mercury is predominantly composed of metal and rock, with a small iron core. It does not have a significant atmosphere, so it is not mostly gas like the gas giants in our solar system.
The Comets.
Mercury's composition consists mainly of silicate rock with a metallic core. The planet's core is believed to be primarily composed of iron and nickel, similar to Earth's core. Mercury's thin atmosphere is made up of gases such as oxygen, sodium, hydrogen, and helium.
No. An asteroid is composed of rock and/or metal and usually has an irregular shape.
The Comets.
Terrestrial planets are close to the sun and include Mercury, Venus, Earth, and Mars. They are mostly composed of rock and metal. Gaseous planets are further from the sun and include Jupiter, Saturn, Uranus, and Neptune. They are mostly composed of gases like hydrogen and helium.
Mercury's thin atmosphere is composed mostly of oxygen, sodium, hydrogen, helium, and potassium. These minor gases are present in trace amounts, with oxygen being the most abundant of the minor gases and sodium being the next most abundant. These gases play a role in the dynamics and composition of Mercury's exosphere.