In the Periodic table there is a few types of gases. These are the nobles, two of the halogens the three nonmetals.
The nobles are Helium, neon, argon, krypton, Xenon, Radon and Organesson. The noble gases are special because they are non reactive with other elements. Radon and Organesson are radio-active.
The two Halogen gases are Florine and chlorine. They are very reactive and chorine is very hazardous if miss used.
Floride that’s a compound of Florine is in toothpaste and helps to stop cavities.
The three non metals are Hydrogen, Oxygen, and Nitrogen.
Hydrogen is the lightest and first element. It is also very flammable and it what powers the sun.
Nitrogen makes up 78% of the air we breath and is present in all living things.
Oxygen is also in the air and like Nitrogen it is in all living things and is vital for us to to live. It also vital component for fire.