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Charge, q, on nucleus

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What is total charge of the neptunium nucleus? (93 electrons MW=237.0482)

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Any atom is electrically neutral (total charge - zero)
The atom is composed of a small compact nucleus which has positive charge surrounded by a cloud of negatively charged electrons.

Each electron carries a unit negative charge denoted -e.
In MKS units each electron carries -1.6E-19 Coulomb.

So the electron cloud around the Neptunium nucleus has a total charge of ...

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