Number of protons = Number of electrons = Atomic number = Number
in the periodic table
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Unless it is an ion, the number of electrons will equal the
number of protons.
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The number of protons is similar to the atomic number.
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The Atomic Number of an element is the same as the number of
protons in the nucleus of an atom of that element and/or the number
of electrons a in neutral atom of that element.
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The number of protons in an atom of an element is equal to the
number of electrons in that atom which is equal to that element's
atomic number.