Depends on which isotope you are asking about. All elements have isotopes, and each element has a different number of protons.
Is two or more atoms of the same element that have different number of neutron.
Beryllium has 4 protons
You can tell how many protons an element has from its atomic number. So the atomic number of Strontium is 38..so it has 38 protons.
26 protons
Radium has 88 protons.
Is two or more atoms of the same element that have different number of neutron.
Osmium has as many protons as it needs
2 protons
It has 26 protons.
Bohrium has 107 protons.
26 protons
39 protons
how many protons does the carbonate ion have?
Beryllium has 4 protons
Oxygen has eight protons.
None -- all protons are protons, which are different from neutrons.
Livermorium has 116 protons.