Nickel has two stable isotopes, nickel-58 and nickel-60. The percent abundance for nickel-58 is about 68.077% and for nickel-60 is about 26.223%. The remaining percent is made up of other isotopes of nickel.

Two US nickels have 13 stars on them. The "Shield" nickel minted from 1866 to 1883 and the "Liberty Head" nickel minted from 1883 to 1912. Both nickel types were minted in 1883.

The chemical symbol of nickel is Ni.
The chemical symbol of silver is Ag.

The isotopes of nickel share the same number of protons (28) but differ in the number of neutrons in their nuclei, resulting in different mass numbers. Each isotope of nickel has a different abundance in nature, with nickel-58 being the most common.

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