Sir Davy (the guy who named it) originally called it Alumium, but later changed it to Aluminum. Aluminium emerged around the same time, as a change to bring the word more in line with elements like Sodium, but Davy was not the one that proposed the change. Both words have been used interchangeably since their inception in the 1800s and neither have ever been considered wrong.It's not "aloominum" it's aluminium.................
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