In August 2018, the discovery of Helium completed 150 years. It was discovered by team of International astronomers observing the total solar eclipse from the Madras Observatory in India.
About:
Helium is a chemical element with symbol He and atomic number 2.
Properties:
It is a colourless, odourless, tasteless, non-toxic, non-flammable gas that is lighter than air. When balloons are filled with helium, they will float.
Its boiling point is the lowest among all the elements.
Source:
In universe: After hydrogen, helium is the second most abundant element in the observable universe, the vast majority of which was formed during the Big Bang. Large amounts of new helium are being created by nuclear fusion of hydrogen in stars.
On Earth: On Earth it is relatively rare. Most terrestrial helium present today is created by the natural radioactive decay of heavy radioactive elements.
Application:
Liquid helium is used in cryogenics (its largest single use), particularly in the cooling of superconducting magnets, with the main commercial application being in MRI scanners.
A well-known but minor use is as a lifting gas in balloons and airships.
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