Problem: If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number is ___If an atom contains 11 protons and 12 neutrons, its atomic number is ___

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We´re asked to determine the mass number of an atom and the atomic number of another atom from their respective subatomic particles.


Recall that the symbol for an element or ion is as follows:

 


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Problem Details

If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number is ___

If an atom contains 11 protons and 12 neutrons, its atomic number is ___