Well, no, it’s how the parts of the world that speak British English spell it, plus countries that borrowed it directly as a loanword from BE (most of the EU). In Russia it’s алюминий, in Egypt it’s الألومنيوم, in Italian it’s alluminio, Turkish it’s aluminyum, etc.
This is just a British vs. American English difference, like gray/grey.
It’s also how the rest of the world spells that element.
Well, no, it’s how the parts of the world that speak British English spell it, plus countries that borrowed it directly as a loanword from BE (most of the EU). In Russia it’s алюминий, in Egypt it’s الألومنيوم, in Italian it’s alluminio, Turkish it’s aluminyum, etc.