Hydrogen. This is because its atomic structure contains one proton, one neutron (or in some cases, no neutrons) and one electron, which are nearly massless particles, due to their size. This lack of subatomic particles results in little to no gravitational pull on it, causing it to float upwards much faster than other gases, such as neon or nitrogen.
helium
saturn the 5th planet from the sun is the lighest planet in the solar system.
not heavy
umbro
Hydrogen
beef
Helium
the waler
It is not. It is the lighest.
Hydrogen
Randy Couture, 220 pounds.
The lightest chemical element is hydrogen. It has an atomic number of 1 and is the most abundant element in the universe. It is a colorless, odorless, and highly flammable gas.