Is Helium a Gas?

helium (He), chemical element, inert gas of Group 18 (noble gases) of the periodic table. The second lightest element (only hydrogen is lighter), helium is a colourless, odourless, and tasteless gas that becomes liquid at −268.9 °C (−452 °F).

Why is helium an example of gas?

Helium is the only element that does not solidify under ordinary pressures and remains a liquid even at absolute zero. Helium is one of the inert or noble gases. This means that its outside electron shell is filled with electrons. This makes it very unreactive and non-flammable.

Is helium a gas or plasma?

Inert gas plasmas – Helium, neon, and argon are the three inert gases used in plasma technology, although argon is the most common because of its low cost.