https://www.ebi.ac.uk/chebi/CHEBI:30219
helium-4 atom (CHEBI:30219)
The stable isotope of helium with relative atomic mass 4.002603. The most abundant (99.99 atom percent) isotope of naturally occurring helium.
helium 4atomchebi
https://www.merriam-webster.com/dictionary/helium-4
HELIUM-4 Definition & Meaning - Merriam-Webster
The meaning of HELIUM-4 is helium.
helium 4definitionmeaningmerriamwebster