TIL that Helium is the only element that is not a metal with the -ium suffix and it’s because Helium was named before -ium was used to indicate metals.

https://pubs.acs.org/doi/10.1021/ed081p944
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1g5ty7g/til_that_helium_is_the_only_element_that_is_not_a/