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OpenStudy (amberofficial1):
Why is it impossible for an atom to have an atomic number of 12 and a mass number of 10
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OpenStudy (toloaf):
It is impossible because the mass number of an atom must always be greater than or equal to the atomic number of an atom. The reason for this: mass number = atomic number(number of protons) + number of neutrons Also this video proved to be quite helpful to me: https://youtu.be/I-Or4bUAIfo
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