ABSTRACT
Table Layout Column number Column title Description 1 Isotope or Element For elements, the atomic number and chemical symbol are listed. For nuclides, the mass number and
chemical symbol are listed. Isomers are indicated by the addition of m, m1, or m2. 2 Isotopic Abundance The abundance of an isotope in normal terrestrial samples of an element, listed in atom percent. 3 Atomic Mass or Atomic
Weight Atomic mass relative to 12C = 12. Atomic weight of elements is given on the same scale.
