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27 April, 03:20

How many protons, neutrons, and electrons are there in an atom of potassium-39?

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Answers (2)
  1. 27 April, 06:39
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    19 protons, 20 neutrons and 18 electrons. i think
  2. 27 April, 06:48
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    19 - Protons (as the atomic number of proton is 19)

    20 - Neutrons (39 minus the amount of protons = the neutrons)
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