Helium is a chemical element with symbol He and atomic number 2.
Helium is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. The He boiling and melting points are the lowest among all the elements.
Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined.
Other names : | Helium |
MF: | He |
Formula weight : | 4 |
Density: | 0.17kg/m³ |
CAS No: | 7440-59-7 |
EINECS No: | 275-187-7 |
UN No: | UN1046 |
Purity: | 99.99%-99.9999% |
Appearance: | Colorless |
