|Period||1||Boiling point||−268.928°C, −452.07°F, 4.222 K|
|Block||s||Density (g cm−3)||0.000164|
|Atomic number||2||Relative atomic mass||4.003|
|State at 20°C||Gas||Key isotopes||4He|
|Electron configuration||1s2||CAS number||7440-59-7|
|ChemSpider ID||22423||ChemSpider is a free chemical structure database|
- Helium is the element which you can find on the upper right side of the periodic table with atomic number 2. It comes first amongst the family of the noble gases. It holds one atomic orbital and was named by Lockyer and Frankland. Its name is derived from the Greek word “Helios” meaning Sun. Scientists knew there is an enormous amount of helium in the Sun before it was discovered.
- Helium falls under inert gas since its outermost electron orbital is full with two electrons. Helium can also be found in lasers, compressed air tanks and coolant in nuclear reactors. It holds the lowest boiling and melting points among the all other elements. The Nuclear fusion of hydrogen in stars generates a significant amount of helium.
- The primary use of Helium goes in altitudes research and meteorological balloons.
- It is utilized as an inert protective gas in autogenous welding.
- It is the only cooler capable of declining temperature lower than 15K (-434ºF).
- Ultralow temperature is main application is the development of superconductivity state wherein the resistance to electricity flux is almost next to zero.