isotopic mass
121Molecular diffusion — This article is about spontaneous dispersion of mass. For a more generic treatment of diffusion, see Diffusion. Diffusion from a microscopic and macroscopic point of view. Initially, there are solute molecules on the left side of a barrier… …
122Planet — This article is about the astronomical object. For other uses, see Planet (disambiguation) …
123Nucleosynthesis — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical decays …
124Carbon star — A carbon star is a late type star similar to a red giant (or occasionally to a red dwarf) whose atmosphere contains more carbon than oxygen; the two elements combine in the upper layers of the star, forming carbon monoxide, which consumes all the …
125Isotopes of silver — Naturally occurring silver (Ag) is composed of the two stable isotopes 107Ag and 109Ag with 107Ag being the more abundant (51.839% natural abundance). Standard atomic mass: 107.8682(2) u. Twenty eight radioisotopes have been characterised with… …
126Isotopes of cadmium — Naturally occurring cadmium (Cd) is composed of 8 isotopes. For two of them, natural radioactivity was observed, and three others are predicted to be radioactive but their decays were never observed, due to extremely long half life times. The two …
127Isotopes of iron — Naturally occurring iron (Fe) consists of four isotopes: 5.845% of radioactive 54Fe (half life: >3.1 times;1022 years), 91.754% of stable 56Fe, 2.119% of stable 57Fe and 0.282% of stable 58Fe.60Fe is an extinct radionuclide of long half life (1.5 …
128Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… …
