Helium (from Ancient Greek: ἥλιος, romanized: helios, lit. 'sun') is a chemical element; it has symbol He and atomic number 2. It is a colorless, odorless, non-toxic, inert, monatomic gas …

Dec 4, 2025 · Helium, chemical element, inert gas of Group 18 (noble gases) of the periodic table. The second lightest element, helium is a colorless, odorless, and tasteless gas that becomes …

Element Helium (He), Group 18, Atomic Number 2, s-block, Mass 4.003. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Helium is an odorless, nontoxic, colorless, tasteless gas; it has a very low chemical reactivity and it is lighter than air. These characteristics are why helium plays a prominent role in space …

The second most abundant element in the universe, helium is a product of nuclear fusion and radioactive decay. It is the lightest noble gas, colorless, odorless, and inert with a low boiling …

Helium (pronunciation: HEE-lee-em) is a colorless, odorless element classified as a non-metal, belonging to the group of inert gases in the periodic table and is represented by the chemical …

Oct 19, 2023 · What is helium used for, and where does it come from? Learn facts about this noble gas, including how it causes balloons to float, its surprising uses in medicine and …

Explore the versatile world of Helium, the second most abundant element in the universe. Learn about its physical and chemical properties, historical background, and varied applications in …

May 18, 2015 · Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group …

helium noun he· li· um ˈhē-lē-əm : a light colorless nonflammable gaseous element found especially in natural gases and used chiefly for inflating airships and balloons, for filling …