They can be depending on the temperature and pressure. They can also be liquids and solids. At room temperature and pressure they are gases.
Helium, hydrogen, and air are gases.
hydrogen and helium
The major gases in Neptune's atmosphere are hydrogen, helium, and methane. Hydrogen and helium are the most abundant gases, with methane making up a smaller but still significant proportion.
Gases found are Hydrogen and helium
Hydrogen and helium. Mostly hydrogen.
Mercury is made up of Helium, Hydrogen, and other gases Mercury is made up of Helium, Hydrogen, and other gases
The main gases in Saturn's atmosphere are hydrogen and helium, with small amounts of other gases like methane and ammonia. Helium is the second most abundant gas in Saturn's atmosphere after hydrogen.
Helium has replace hydrogen in airships
hydrogen and helium.
Mostly Hydrogen and Helium.
Hydrogen and Helium
Hydrogen, Helium