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If an atom contains 4 protons, 5 neutrons, and 4 electrons, its mass number is?​

If an atom contains 4 protons, 5 neutrons, and 4 electrons, its mass number is?​
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If an atom contains 4 protons, 5 neutrons, and 4 electrons, its mass number is?​

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User Tom Marienfeld
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1 Answer

4 votes
Answer is Mass number of
9
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User Andriy Bilous
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