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16 December, 16:30

How do we calculate the number of protons, electrons and neutrons in an element?

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  1. 16 December, 16:41
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    The atomic number of an element is equal to the number of protons. It the element has a neutral charge then the number of protons equals the number of electrons. The number of neutrons equals the atomic mass minus the atomic number.

    ex:

    Sodium

    Atomic number: 11

    Atomic mass: 23

    Protons: 11

    Electrons: 11

    Neutrons: 23 - 11 = 12
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