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uh, for one thing mass and atomic nUmbers. and the other: it has 20 protons and 33 neutrons. The atom would have 20 protons and 33 neutrons. The number of protons is always the same as the atomic number. To find the number of neutrons, you simply subtract the atomic number from the Atomic Mass. Atomic mass - Atomic number = number of neutrons (53 - 20 = 33) If you add the number of protons and the number of neutrons together, you should get the atomic mass.

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Q: If an atom has an atomic namber of 20 and a mass namber of 53 how many protons and neutrons does that atom have?
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The protons and neutrons are to be found in the atomic nucleus.


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