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There has been a slight but highly significant error in the mass recorded in the infobox since 16th July 2006! I have corrected it and also updated the binding energy to the latest 2020 data (no significant change since the 2016 values used in Isotopes of helium). PaddyLeahy ( talk) 08:51, 22 March 2021 (UTC)
"When liquid helium-4 is cooled to below 2.17 kelvins (−271.17 °C)". This is wrong. 2,17 Kelvin is NOT −271.17 °C. 188.150.82.80 ( talk) 01:02, 11 February 2022 (UTC)
The info box lists the "Isotope mass" under the header "Nuclide data", suggesting that this is the mass of the nucleus of the 4He isotope. However, if I'm not mistaken, this turns out to be the mass of the full isotope/atom, including electrons. Should this be clarified? AstroFloyd ( talk) 11:55, 17 January 2024 (UTC)