Physics
posted by Tiffany .
We want to ﬁnd how much charge is on the
electrons in a nickel coin. Follow this method.
A nickel coin has a mass of about 4.9 g.
Find the number of atoms in a nickel coin.
Each mole (6.02 × 10
23
atoms) has a mass of
about 58.1 g.
Answer in units of atoms
Find the number of electrons in the coin. Each
nickel atom has 28 electrons/atom.
Answer in units of electrons
Find the magnitude of the charge of all these
electrons.
Answer in units of C

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