QUESTION IMAGE
Question
multiple choice question
the atomic number of an atom is equal to
the number of neutrons plus the number of protons in the nucleus
the number of neutrons in the nucleus
the number of protons in the nucleus plus the number of electrons
the number of protons in the nucleus
Brief Explanations
The atomic number of an atom is defined as the number of protons in the nucleus of the atom. The sum of neutrons and protons gives the mass - number. Electrons are outside the nucleus and not part of the atomic - number calculation.
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the number of protons in the nucleus