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What makes up nearly all of the atom's mass? A. The sum of all protons and neutrons B. The sum of all neutrons and electrons C. The sum of all protons and electrons D. The sum of all isotopes SUBMIT
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What makes up nearly all of the atom's mass?

A. The sum of all protons and neutrons
B. The sum of all neutrons and electrons
C. The sum of all protons and electrons
D. The sum of all isotopes
SUBMIT

User Sam Texas
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2 Answers

5 votes
A the sum of all protons and neutron
User Hephaestus
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5.5k points
4 votes

Answer:

a. the sum of all protons and neutrons

User ExxKA
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5.5k points
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