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An atom with 5 protons, 6 neutrons, and 5 electrons has an atomic mass of _____ amu. (Enter a whole number.)

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KindaSmartPersonn
The answer is 11 Amu
budwilkins
Yes it is 11 atomic mass units (amu). Atomic mass (aka mass number) is asking "what is the weight of the nucleus?"
The nucleus contains all of the protons and neutrons, thus:
atomic mass = P + N = 5 + 6 = 11 amu