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How many protons are in the radioactive isotope 40/19K

How many protons are in the radioactive isotope 40/19K
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How many protons are in the radioactive isotope 40/19K

User Kyzen
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The answer to this question is 19

User Palmer
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I am assuming K is potassium and potassium atoms have 21 protons and 21 neutrons. hope that helps some
User John Himmelman
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