@Codeschubse @coreyspowell I say aluminium because that's what I grew up saying, but: platinum, molybdenum, lanthanum. There are two conventions and picking one is arbitrary, even if one is dominant.
The British coiner of the word picked -um and the British, US and global chemical communities switched it to -ium, only to be thwarted by *shakes fist* Weeebsteeer.