21-scandium Naturally occuring isotopes:
Sc-45 ( 100% )
Isotopes:
Sc-36 Sc-37 Sc-38 Sc-39 Sc-40 Sc-41 Sc-42 Sc-43 Sc-44 Sc-46 Sc-47 Sc-48 Sc-49 Sc-50 Sc-51 Sc-52 Sc-53 Sc-54 Sc-55 Sc-56 Sc-57 Sc-58 Sc-59

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