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If a neutral atom of beryllium has 4 protons and 5 neutrons, what is the mass number of the atom?

If a neutral atom of beryllium has 4 protons and 5 neutrons, what is the mass number of the atom?
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If a neutral atom of beryllium has 4 protons and 5 neutrons, what is the mass number of the atom?

User Atrujillofalcon
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1 Answer

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9 is the mass of the atom
User Vicktoria
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