The mass number of an atom is calculated as the number of protons plus neutrons. Therefore, the correct response is: It is the number of protons plus neutrons.
How is the mass number calculated for an atom involved in nuclear fusion?(1 point) Responses It is the number of electrons. It is the number of electrons. It is the number of protons plus neutrons. It is the number of protons plus neutrons. It is the number of protons plus electrons. It is the number of protons plus electrons. It is the number of neutrons. It is the number of neutrons.
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