This table presents properties of nuclides, both stable and radioactive, adopted from the 7th edition of the Table of Isotopes. The data are based on experimental results reported in the literature, with the cutoff date varying from January to December, 1977. (The earliest date refers to the lightest nuclides, and vice versa.) Most mass excesses are from the 1977 Atomic Mass Evaluation, with some recent experimental values added. For a few of the very unstable nuclides for which no values were reported in the 1977 Atomic Mass Evaluation, estimates are taken from the tables of W.D. Myers. Natural isotopic abundances and neutron cross sections are taken from compilations by N.E. Holden. For other references, original data, and information on the data measurements, the reader is referred to reference 1.