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AMA Manual of Style Committee

Contents

Metastable Isotopes

Chapter:
Nomenclature
Author(s):

Margaret A. Winker

15.9.7 Metastable Isotopes

The abbreviation m, as in krypton Kr 81m or technetium Tc 99m, stands for metastable. The abbreviation should never be deleted, since the term without the m designates a different radionuclide isomer.