There are seven permanent gases:
1. Hydrogen (H2)
2. Helium (He)
3. Nitrogen (N2)
4. Oxygen (O2)
5. Fluorine (F2)
6. Neon (Ne)
7. Chlorine (Cl2)
These gases are characterized by their low intermolecular forces, which prevent them from condensing to a liquid at room temperature. They are also all diatomic molecules, meaning they are composed of two atoms bonded together.
Permanent gases are found in a variety of places, including the atmosphere, the oceans, and the Earth's crust. They are also used in a variety of industrial and commercial applications, such as welding, refrigeration, and food processing.
Here are some additional facts about permanent gases:
* Hydrogen is the most abundant element in the universe, and it is also the lightest permanent gas.
* Helium is the second lightest permanent gas, and it is also the second most abundant element in the universe.
* Nitrogen is the most abundant permanent gas in the Earth's atmosphere, making up about 78% of its volume.
* Oxygen is the second most abundant permanent gas in the Earth's atmosphere, making up about 21% of its volume.
* Permanent gases are all colorless and odorless.
* Permanent gases are all non-flammable.
* Permanent gases are all good electrical insulators.
