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

User Mc Missile
by
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1 Answer

1 vote

Answer:

9

Step-by-step explanation:

mass number =protons+neutrons

User Jing
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