All of them can be gases, but under standard conditions mercury is a liquid.
At room temperature: Oxygen & Nitrogen are gases, Carbon is solid, & Mercury is a liquid.
gas
air has oxygen in it but also other gases, e.g. helium nitrogen.
Nitrogen is the heavier gas (mass of 28) compared to helium (mass of 4).
Substances that exist in the gaseous phase are commonly referred to as gases. The most common example of a gas is air (the air we breathe is a gas). It can also be considered as a mixture of many gases such as nitrogen, oxygen, and carbon dioxide.
nitrogen,Helium,oxygen
nitrogen,Helium,oxygen
Nitrogen, helium, carbon dioxide.
Helium gas, and trace amounts of Oxygen and Nitrogen.
nitrogen helium oxygen and gas
Helium floating in air, which is 78% nitrogen and 21% oxygen.
At room temperature: Oxygen & Nitrogen are gases, Carbon is solid, & Mercury is a liquid.
gas
air has oxygen in it but also other gases, e.g. helium nitrogen.
Hydrogen Anaesthetic gas oxygen natural gas helium carbon dioxide argon nitrogen
Examples of gases: oxygen, helium, radon, nitrogen, etc.
Five common gasses are Oxygen Nitrogen Carbon Dioxide Hydrogen Helium