How to find out number of protons in an atom

- How to find number of protons in an atom
- How to find of protons in an atom
- How do you find the number of protons of an atom
- How can you find out the number of protons in an atom
- How do you find out the number of protons in an atom
- How to find number of protons neutrons and electrons
- How to find the number of neutrons in an element
- How to calculate the number of neutrons in an atom
- How to find proton neutron and electron of an element