isotopic mass
31Brazil and weapons of mass destruction — Based on Brazil s history, it is believed that the country does not possess any weapons of mass destruction. Although a covert nuclear weapons program was pursued by Brazil under a military government in the 1980s, it ended with the rise of an… …
32Isotopes of neon — Neon (Ne) possesses three stable isotopes, 20Ne, 21Ne, and 22Ne. In addition, 16 radioactive isotopes have been discovered ranging from 16Ne to 34Ne, all short lived. The longest lived is 24Ne with a half life of 3.38 minutes. All others are… …
33Isotopes of chlorine — Chlorine (Cl) has 24 isotopes with mass numbers ranging from 28Cl to 51Cl and 2 isomers (34mCl and 38mCl). There are two principal stable isotopes, 35Cl (75.78%) and 37Cl (24.22%), found in the relative proportions of 47.89:12.11, not 3:1,… …
34Isotopes of oxygen — Late in a massive star s life, 16O concentrates in the O shell, 17O in the H shell and 18O in the He shell There are three stable isotopes of oxygen that lead to oxygen (O) having a standard atomic mass of 15.9994(3) u. 17 radioactive isotopes… …
35Isotopes of osmium — Osmium (Os) has seven naturally occurring isotopes, 6 of which are stable: 184Os, 187Os, 188Os, 189Os, 190Os, and (most abundant) 192Os. The other one, 186Os, has an extremely long half life (2×1015 years) and for practical purposes can be… …
36Isotopes of molybdenum — There are 33 known isotopes of molybdenum (Mo) ranging in atomic mass from 83 to 115, as well as four metastable nuclear isomers. Seven isotopes occur naturally, with atomic masses of 92, 94, 95, 96, 97, 98, and 100. Of these naturally occurring… …
37Isotopes of nitrogen — Natural Nitrogen (N) consists of two stable isotopes, nitrogen 14, which makes up the vast majority of naturally occurring nitrogen, and nitrogen 15. Fourteen radioactive isotopes (radioisotopes) have also been found so far, with atomic masses… …
38Isotopes of neodymium — Naturally occurring neodymium (Nd) is composed of 5 stable isotopes, 142Nd, 143Nd, 145Nd, 146Nd and 148Nd, with 142Nd being the most abundant (27.2% natural abundance), and 2 radioisotopes, 144Nd and 150Nd. In all, 33 radioisotopes of Neodymium… …
39Isotopes of cerium — Naturally occurring cerium (Ce) is composed of 4 stable isotopes: 136Ce, 138Ce, 140Ce, and 142Ce with 140Ce being the most abundant (88.48% natural abundance); 136Ce, 138Ce, and 142Ce are predicted to undergo double beta decay but this process… …
40Isotopes of manganese — Naturally occurring manganese (Mn) is composed of 1 stable isotope; 55Mn. 25 radioisotopes have been characterized with the most stable being 53Mn with a half life of 3.7 million years, 54Mn with a half life of 312.3 days, and 52Mn with a half… …
