The atomic mass of an atom equals the sum of the masses of the _____.
A. protons and electrons
B. electrons and neutrons
C. protons and neutrons
D. none of the above

The atomic mass of an atom equals the sum of the masses of the protons and neutrons.

A=atomic mass
Z=atomic number (or number of protons=
N=number of neutrons.

A=Z+N

Answer: C. protons and neutrons.

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TheHealingHealer TheHealingHealer · Answer 2 · 2016-10-18T19:32:45+02:00

TheHealingHealer TheHealingHealer

18-10-2016

The answer is C.

The atomic mass is composed of the number of protons and neutrons. Electrons don't count since they orbit around the atom.

100% sure. :)

Hope this helped,
-*Starry*

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The atomic mass of an atom equals the sum of the masses of the _____. A. protons and electrons B. electrons and neutrons C. protons and neutrons D. none of the above

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The atomic mass of an atom equals the sum of the masses of the _____.
A. protons and electrons
B. electrons and neutrons
C. protons and neutrons
D. none of the above