HELIUM (He)
- Atomic number = 2
- Atomic mass = 4.002602 amu
- Number of protons/electrons = 2
- Number of neutrons = 2
- Classified as a Noble Gas
- Discovered in 1895 by Sir William Ramsay
- Used in balloons and deep sea diving
- Obtained from natural gas deposit and air
- Second lightest element
Colorless gas, exhibiting a purple glow when placed in a high voltage electric field
Liquified helium
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