Here's why:
* Chemical symbols: Chemical formulas use symbols from the periodic table. "ba" doesn't correspond to any known element.
* Subscripts: The numbers in a chemical formula indicate the number of atoms of each element. "3" and "2" are used as subscripts, but the lack of a recognized element symbol makes the formula meaningless.
If you have a different chemical formula in mind, please provide it, and I can help you determine if it represents a compound or an element.
