Symbol: He

Atomic Number: 2

Atomic Weight: 4.0026

Helium (atomic number 2, symbol He) is a non-toxic, tasteless, odorless, and colorless gas. Heading the noble group, it is an inert monoatomic gas, and its melting and boiling points are some of the lowest compared with other elements. Except in extreme conditions, helium exists as gas only. Helium is also the second most abundant and the lightest element, which is present in around 24 percent of the elemental mass. This makes over twelve times the combined mass of heavier elements. The abundance of helium is similar to this percentage in Jupiter and the Sun because of its high binding...Read More