How many protons are in an atom represented by 22088ra88220ra?

Answer is: there are eighty-eight (88) protons in an atom.

The atomic number (Z) determines total number of protons and uniquely identifies a chemical element, also the atomic number is equal to the number of electrons.

The atomic number (Z) for this atom (radium) is eighty-eight.

The mass number (A) is total number of protons and neutrons in a nucleus, in this example A = 220.