1.The major portion of an atom's mass consists of
A.electrons and protons
B.electrons and neutrons
C.neutrons and positrons
D.neutrons and protons
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1.The major portion of an atom's mass consists of
A.electrons and protons
B.electrons and neutrons
C.neutrons and positrons
D.neutrons and protons
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Answer:
C.neutrons and positrons
Explanation:
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