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11 October, 08:52

A sodium has an atomic number of 11 and the atomic mass of 23. Determine the its proton, electrons, and neutrons

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  1. 11 October, 09:04
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    The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass). Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 - 11 = 12 neutrons.
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