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The mass of an atom is equal to the number of

Neutrons, only
Protons, only
Neutrons plus protons
Electrons plus protons

User NguyenDat
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2 Answers

5 votes

Answer:

Neutrons & protons

Step-by-step explanation:

hope it's help..

User Miguel Alonso Jr
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11 votes

Step-by-step explanation:

proton number and neutron number sums up to form the mass number

User Kalsowerus
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