There are different standard spellings, and pronunciations, in different places. In one dialect region it is "aluminium" (but they don't say "platinium" or "mol

There are different standard spellings, and pronunciations, in different places. In one dialect region it is "aluminium" (but they don't say "platinium" or "molybdenium"). In another it is "aluminum" (but they don't say "titanum" or "cesum"). It is arbitrary in both regions.