Helium comes from the greek word "Helios" meaning "Sun".

It was discovered by Pierre Jules César Janssen of in 1868.

Helium Is a light weight gas that occurs in the atmosphere. Because it is lighter than air, helium is used to fill balloons.

:zap: Properties of Helium :zap:

1. Atomic number: 2

2. Atomic symbol: He

3. Atomic weight: 4.002602

4. Density: 0.0001785 grams per cubic centimeter

5. Phase at Room temperature: Gas

6. Melting point:

    - Minus 458.0 degrees Fahrenheit

     - Minus 272.2 degrees Celsius

7. Boiling point:

     - Minus 452.07 degrees Fahrenheit

     - Minus 268.93 degrees Celsius

8. Ionization Energy: 24,5874

9. Number of isotopes: 8; 2 stable

10. Most common isotopes:

     - He-4 (99.999866 percent natural abundance)

    - He-3 (0.000134 percent natural abundance)

Source:

★ Live Science