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IRINA_888 [86]
3 years ago
13

What is the mass number of an atom with 3 protons, 4 neutrons, and 3 electrons

Physics
1 answer:
snow_tiger [21]3 years ago
5 0

Mass number = no. of protons + no. of neutrons

 so, it would be, 3+4 = 7

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