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What is the mass number of an atom that contains 85 protons 133 neutrons and 85 electrons​

What is the mass number of an atom that contains 85 protons 133 neutrons and 85 electrons​
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What is the mass number of an atom that contains 85 protons 133 neutrons and 85 electrons​

User Tudor Ilisoi
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The mass would be the sum of the protons and neutrons. Your answer would be 218
User Tomilov Anatoliy
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