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OpenStudy (anonymous):
If an isotope of oxygen has 8 protons, 10 neutrons, and 8 electrons, its mass number is
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OpenStudy (anonymous):
Mass number is equivalent to the sum of protons and neutrons. In this case, the mass number of this isotope is 8 + 10 = 18.
OpenStudy (anonymous):
Some additional information: to find the atomic number, know that the atomic number is equivalent to the amount of protons/electrons.
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