Helium

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

Field Hierarchy

Parent
Physics 31.7M papers	Chemistry 28.4M papers	Quantum mechanics 13.1M papers	Organic chemistry 12.8M papers
Atomic physics 1.5M papers
Current
Helium 78.2k papers
Child
Liquid helium 12.2k papers	Superfluid helium-4 6,170 papers	Helium atom 3,310 papers	Helium-4 3,133 papers
Isotopes of helium 2,534 papers	Helium gas 1,475 papers	Roton 1,276 papers	Quantum vortex 1,152 papers
Gas pycnometer 714 papers		Lambda point refrigerator 655 papers

Trends

Notes

History