A sodium atom has 11 protons and 12 neutrons. What is the mass number of this sodium atom?

asked Oct 12, 2022 52.1k views

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Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.

Brubs answered Oct 18, 2022

by Brubs

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