Which of the following is the correct symbol for the element Aluminium?
Al
According to IUPAC rules, the symbol of a chemical element is written using one or two letters, where the first letter is always capitalised and the second letter, if present, is written in lowercase.
Aluminium is represented by two letters taken from its name, with the first letter capital and the second in lowercase, giving the symbol Al.
Options like Alm, alm and AL violate the standard rules of symbol writing and are therefore incorrect.
Hence, the correct answer is Al.
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