aThe element X has three isotopes: X-221, X-220, and X-218, with masses 220.9, 220.0, and 218.1 amu. The relative abundances of these three isotopes are 74.22%, 12.78%, and 13.00%, respectively. Calculate the atomic mass of element X. 元素x有三同位素: X-221, X-220和X-218,与大量...
The atomic mass or mass number is usually given as a decimal, due to the number of isotopes found and their relative abundance. Some known isotopes have a specific number of neutrons and are helpful when talking about radioactive materials. Molar Mass Calculator Common Compounds Periodic ...
By default, the program will use the mass corresponding to the most abundant isotopologue for the indicated atom. To perform computations for other isotopologues, pass the desired mass numbers for particular atoms using the-i/--isotopesflag. Atoms are specified by their index, starting from 0, ...
Mass of the molecule with the most-highly represented isotope distribution, based on the natural abundance of the isotopes. Nominal Mass Sum of the integer masses (ignoring the mass defect) of the most abundant isotope of each element in a molecule. ...
aThe element oxygen consists of three isotopes with masses 15.994915, 16.999133, and 17.99916 amu. The relative abundances of these three isotopes are 99.7587%, 0.0374%, and 0.2039%, respectively. From these data calculate the average atomic mass of oxygen. 元素氧气包括三同位素与大量15.994915, 16.99...