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Chemistry, 22.08.2019 12:00 alexar6332

What is the total number of protons in the nucleus of an atom of potassium-42?
(1) 15 (3) 39
(2) 19 (4) 42

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What is the total number of protons in the nucleus of an atom of potassium-42?
(1) 15 (3) 39<...

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