Nickel has 28 protons. Nickel has stable isotopes with the Atomic Mass (neutrons + protons) of 58, 60, 61, 62, 64. 58Ni is the most common isotope; if you subtract the protons, that leaves 30 neutrons. However, the other isotopes have more than 30 neutrons.
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There are 5 cents in a nickel.
A nickel has a smooth edge. No ridges.
5 pennies make a nickel.
There is 5 cents in one nickel.
The diameter of a US nickel is 0.835 inches.