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trasher [3.6K]
4 years ago
13

If an atom contains 60 protons, 60 electrons, and 89 neutrons. What is the mass number of the atom? *

Chemistry
1 answer:
Diano4ka-milaya [45]4 years ago
3 0
To come up with the mass of the atom is you add the protons with the neutrons

so you have
60+89=149
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