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3 years ago

12

If a neutral atom of boron (B) contains 5 protons, 5 electrons and 6 neutrons, what is the mass number of this atom? (2 points)

2 answers:

viktelen [127]3 years ago

7 0

The atomic mass it 11. 5 Proton and 6 Neutrons is 11 mass. Protons and Neutrons both weigh 1U.

Shkiper50 [21]3 years ago

6 0

I believe the answer is 11, its been awhile since i was in science

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