multiple - choice question\n13. what is the atomic number equal to?\nnumber of neutrons in the…
multiple - choice question\n13. what is the atomic number equal to?\nnumber of neutrons in the nucleus\nnumber of protons in the nucleus\nnumber of electrons in the nucleus
Answer
Brief Explanations:
The atomic number of an element is defined as the number of protons in the nucleus of an atom of that element. Neutrons contribute to the mass - number, and electrons are outside the nucleus in a neutral atom.
Answer:
Number of protons in the nucleus