Hydrogen was, and is, the lightest gas
helium is the lightest air
Helium
helium
Yes, it is.
Not only that, but it's one of lightest, or possibly the lightest, gas in the world. I'm a nerd, so you can trust me.
helium
Helium
Technically Helium is classed as a Noble gas and has a MW of 4g/mol.
Helium is the lightest non-flammable gas. It is colorless, odorless, and tasteless, making it safe for a variety of applications such as lifting balloons and as a coolant in various industries.
The lightest weight element that is not a gas at room temperature is lithium. It is a solid metal with a low density and atomic number 3.
Helium but it is noble gas. Lithium is the lightest solid element that found in natural form.
The second lightest gas is helium. The lightest gas is hydrogen which is also the lightest element. They are very close on the Periodic Table.