Question

what is helium gas? answer correctly

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Answer 1

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).

Boiling point: −268.9 °C (−452 °F) number: 2Atomic weight: 4.002602

Boiling point: −268.9 °C (−452 °F)Atomic number: 2Atomic weight: 4.002602Electron configuration: 1s2

Answer 2

Explanation:

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).

Boiling point: −268.9 °C (−452 °F)

Oxidation state: 0

Density (1 atm, 0 °C): 0.1785 gram/litre