mononuclidic element造句

例句与造句

1. A list of the 22 mononuclidic elements is given at the end of this article.
2. In practice, only 11 of the mononuclidic elements are used in standard atomic weight metrology.
3. Non-mononuclidic elements are marked with an asterisk, and the long-lived primordial radioisotope given.
4. The set of monoisotopic elements overlap but are not the same as the set of 22 mononuclidic elements, which are characterized as having essentially only one isotope ( nuclide ) found in nature.
5. In 3 additional cases ( bismuth, thorium, and protactinium ), mononuclidic elements occur primordially which are not monoisotopic because the naturally occurring nuclide is radioactive, and thus the element has no stable isotopes at all.
6. It's difficult to find mononuclidic element in a sentence. 用mononuclidic element造句挺难的
7. A "'mononuclidic element "'is one of the 22 chemical elements that is found naturally on Earth essentially as a single nuclide ( which may, or may not, be a stable nuclide ).
8. However, there are 22 mononuclidic elements of which essentially only a single isotope is found in nature ( common examples are fluorine, sodium, aluminum and phosphorus ) and for these elements the relative atomic mass and atomic mass are the same.
9. In the case of many elements that have one naturally occurring isotope ( mononuclidic elements ) or one dominant isotope, the actual numerical similarity / difference between the atomic mass of the most common isotope, and the ( standard ) relative atomic mass or ( standard ) atomic weight can be small or even nil, and does affect most bulk calculations.
10. For non-mononuclidic elements that have more than one common isotope, the numerical difference in relative atomic mass ( atomic weight ) from even the most common relative isotopic mass, can be half a mass unit or more ( e . g . see the case of chlorine where atomic weight and standard atomic weight are about 35.45 ).
11. Even then, the half-life of 232 Th is only a billionth that of 209 Bi, the last classically stable nuclide . 232 Th is the only isotope of thorium occurring in significant quantities in nature today, and thus thorium is usually considered to be a mononuclidic element . nevertheless, since thorium and uranium have more protons than bismuth, their nuclei are thus still susceptible to alpha decay because the strong nuclear force is not strong enough to overcome the electromagnetic repulsion between their protons.