RegEx for parsing chemical formulas

Question

I need a way to separate a chemical formula into its components. The result should look like this:

   Ag3PO4 -> [         


        

Answer 1

This should just about work:

/(\(?)([A-Z])([a-z]*)([0-9]*)(\))?([0-9]*)/g

Play around with it here: http://refiddle.com/