20. Why is the nucleus of an atom considered to have a positive charge? A The only particles in the nucleus are the protons (positive charge) and the neutrons (no charge). So, the only charge is from the positive proton. B. The only particles in the nucleus are the protons (positive charge) and the electrons (no charge). So, the only charge is from the positive proton. C. The electrons and the neutrons cancel each other out, leaving only the positive protons. D. There are more protons in an atom than any other particle, so there is a higher degree of positive charges.