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20 February, 16:41

What is Atomic mass

A: the mass of the atom based on the mass of an atom of oxygen-16

B: the mass of an atom based on the mass of an atom of carbon-12

c: the average mass of all isotopes

d: the mass of the atom based on the mass of an atom of hydrogen-1

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Answers (2)
  1. 20 February, 17:02
    0
    The answer is B. Your welcome.
  2. 20 February, 19:07
    0
    I think it's, the sum of all protons and neutrons in the atomic nucleus.

    Apologize if it's wrong.
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