Helium

https://www.wikidata.org/wiki/Q560

Field Hierarchy

Parent
Physics 33M papers	Chemistry 28.9M papers	Quantum mechanics 13.3M papers	Organic chemistry 12.9M papers
Atomic physics 1.6M papers
Current
Helium 82.9k papers
Child
Liquid helium 12.5k papers	Superfluid helium-4 6,728 papers	Helium atom 3,442 papers	Helium-4 3,407 papers
Isotopes of helium 2,634 papers	Helium gas 1,489 papers	Roton 1,354 papers	Quantum vortex 1,270 papers
Gas pycnometer 723 papers		Lambda point refrigerator 689 papers

Trends

Notes

History