positive protons. negative neutrons. negative protons and positive electrons. positive protons and negative neutrons.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The charge of the nucleus of an atom is due to the presence of
Possibilities:
- positive protons.
- negative neutrons.
- negative protons and positive electrons.
- positive protons and negative neutrons.

positive protons.