| 词汇 | example_english_atomic-weight |
| 释义 | Examples of atomic weightThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. He was the discoverer of atomicweight and all physical science and a great deal of chemical science since has been built on his work. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Atomicweight definitions start at greater than sodium (22.98) to greater than 40. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This procedure enabled chemists to determine the new element's atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Copper has a density of 8.94 g/cm, and an atomicweight of 63.546 g/mol, so there are mol/m. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Equivalent weight has the dimensions and units of mass, unlike atomicweight, which is dimensionless. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is numerically equal to the relative atomic mass (or atomicweight) in grams. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. By contrast, there is less variation in naturally occurring hydrogen so the average atomicweight is known more precisely. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Her research focus was on aromatic acids and the atomicweight of palladium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, atomicweight, ie, relative atomic mass, is a dimensionless quantity, and can not take the units of grams per mole. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, as noted in the introduction, atomicweight and standard atomicweight represent terms for averages of isotopic abundances, not for single nuclides. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Work on organizing the elements by atomicweight had hitherto been stymied by inaccurate measurements of the atomic weights. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Hydrogen-1, the lightest isotope of hydrogen and the atom with the lowest mass, has an atomicweight of 1.007825 u. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The groups are horizontal, the elements are in order of increasing atomicweight and there are vacant slots for undiscovered ones. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These radicals have low atomic weights while the persulfate molecule has a high atomicweight (238). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It could be added that atomicweight is often not truly atomic either, as it does not correspond to the property of any individual atom. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This last nuclide is therefore common in the universe, relative to other stable metals of approximately the same atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Xenon propellant is used because of its high atomicweight and low ionization potential. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Their boiling points are higher than the corresponding alkanes and scale with the atomicweight and number of halides. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the example above the atomicweight of carbon is given as 12.011, not 12. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Lead has a higher atomicweight than gold, but is far more common. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Before this discovery, atomic numbers were sequential numbers based on an element's atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Chlorine-37 accounts for 24.23% of natural chlorine, chlorine-35 accounting for 75.77%, giving chlorine atoms in bulk an apparent atomicweight of. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He continued work on that new element, isolated it, studied its properties, and in 1873 determined its atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. His work on the atomicweight of oxygen covered a period of eleven years. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He isolated a quantity of scandium in this same year and determined its atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The equivalent weight of an element is its gram atomicweight divided by its valence (combining power). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With an atomicweight of, hydrogen is the lightest element on the periodic table. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Core fusion increases the atomicweight of its gaseous elements, causing pressure loss and contraction accompanied by increase of temperature. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When the term atomicweight is used in chemistry, usually it is the more specific standard atomicweight that is implied. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The term is equivalent to atomicweight, which is the older term, and which is also sample (source) specific. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This work proved that atomicweight was not a constant. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The term "atomicweight" is being phased out slowly and being replaced by "relative atomic mass", in most current usage. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He was then able to resequence the periodic table by nuclear charge, rather than by atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He is credited with refining the isotopic composition and atomicweight measurements of elements, including antimony, barium, tin and ytterbium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He saw that the similar elements occurred at regular atomicweight intervals. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In practice, only 11 of the mononuclidic elements are used in standard atomicweight metrology. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The relative atomic mass (a weighted average) of these isotopes is the atomicweight listed for the element in the periodic table. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Under these conditions heavier nuclei are created by neutron capture, increasing the atomicweight of the nucleus by one. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, none of these tables were correctthe 19th century tables arranged the elements in order of increasing atomicweight (or atomic mass). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. That r-process abundance curve (vs. atomicweight) gratifyingly resembles computations of abundances synthesized by the physical process. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Only tungsten, a component of a few bacterial enzymes, has a higher atomic number and atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This is because some low atomic number materials have a higher cross section for neutron interaction than higher atomicweight materials. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The atomic number was not established as a concept at that point and therefore the system was based on the atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Contemporary chemists who had already adapted to the new atomicweight reality did not fare better. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Uranium has the second highest atomicweight of the primordially occurring elements, lighter only than plutonium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The isotopes of nickel range in atomicweight from to. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The fertile material in the thorium fuel cycle has an atomicweight of 232, while the fertile material in the uranium fuel cycle has an atomic weight of 238. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is known for numbering its releases via symbols from the periodic table, in increasing order of atomicweight, rather than using the traditional numerical system. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For example, the atomicweight and density of the central element of the triad was at or nearly the mean of the atomic weights of the other two members. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For the natural isotopic composition of each element it shows "name", "atomic number", "symbol", "atomicweight" (or relative atomic mass) and a link to the element's "isotopes". From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The high atomic number of lead also raises the density of the material, since lead has a very high atomicweight of 207.2, versus 40.08 for calcium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Coronium with an atomicweight of 0.51282, nebulium with a weight of 1.6281 and protofluorine with a weight of 2.361. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Both the terms "relative atomic mass" and "atomicweight" are sometimes loosely used to refer to a technically different standardized expectation value, called the standard atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The atomic mass (relative isotopic mass) of an uncommon isotope can differ from the relative atomic mass, atomicweight, or standard atomicweight, by several mass units. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For each metal, they then divided this number by the square of the atomicweight, and found that the ratios were more or less the same. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, in consideration of the elements' observed chemical properties, he changed the order slightly and placed tellurium (atomicweight 127.6) ahead of iodine (atomicweight 126.9). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Uranium has the highest atomicweight of the naturally occurring elements and is approximately 70% denser than lead, but not as dense as tungsten, gold, platinum, iridium, or osmium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In order to indicate the span of atomic-weight values that may apply to sulfur from different natural sources, the value 0.003 was attached to the atomic weight of sulfur. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The two scientists used the caesium chloride thus obtained to estimate the atomicweight of the new element at 123.35 (compared to the currently accepted one of 132.9). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He accurately determined the density of solid mercury, molecular weight of hydrofluoric acid and the atomic weights of lithium (1856), aluminium (1880) and gold. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As a consequence, confusion existed regarding atomic weights and molecular formulas for about half a century. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Their actual trivalency meant that his atomic weights for them were only about 67% of their true values. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He is notable for his work on atomic weights of the elements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Caesium and indium are used due to their high atomic weights, low ionization potentials, and low melting points. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Such measurements are much less precise than modern mass spectrometric measurements of atomic weights and molecular masses, and are of mostly historical interest. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. While molar masses are almost always, in practice, calculated from atomic weights, they can also be measured in certain cases. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The standard atomic weights are reprinted in a wide variety of textbooks, commercial catalogues, wall charts etc., and in the table below. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Their law was used for many years as a technique for measuring atomic weights. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He was intrigued by atomic weights and the periodic occurrence of chemical properties. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Atomic mass figures are thus commonly reported to many more significant figures than atomic weights. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Sc are calcium isotopes and the primary products from higher atomic weights are titanium isotopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Although they turned out to be wrong, these conjectures catalyzed further measurement of atomic weights, a great benefit to chemistry. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. By mid-century, however, some leading figures had begun to view the chaotic multiplicity of competing systems of atomic weights and molecular formulas as intolerable. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Historically, it was these atomic weights of elements (in comparison to hydrogen) that were the quantities measurable by chemists in the 19th century. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Since 1899, it is entrusted with periodic critical evaluation of atomic weights of elements and other cognate data, such as the isotopic composition of elements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It was becoming clear that atomic weights are not constants of nature. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. His major work, however, was that on the atomic weights of the elements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This was followed by investigations of the atomic weights of arsenic and other elements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Because of the relationship between their atomic weights, more precisely 44/12. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The second decision was to occasionally ignore the order suggested by the atomic weights and switch adjacent elements, such as tellurium and iodine, to better classify them into chemical families. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. An uncertainty in brackets is therefore included in sources of standard atomic weights, which often reflects natural variability in isotopic distribution for an element, rather than uncertainty in measurement. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The second decision was to occasionally ignore the order suggested by the atomic weights and switch adjacent elements, such as cobalt and nickel, to better classify them into chemical families. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He is especially noted for his determination of atomic weights; his experiments led to a more complete depiction of the principles of stoichiometry, or the field of chemical combining proportions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. But this or some other such rule was absolutely necessary to any incipient theory, since one needed an assumed molecular formula in order to calculate relative atomic weights. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Langlet was the first to correctly define its atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Silver's atomicweight is 107.8682(2) g/mol. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Moseley realised it was the atomic number, not the atomicweight that determines the order of the elements. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Mendeleev's periodic tables used atomicweight instead of atomic number to organize the elements, information determinable to fair precision in his time. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Mendeleev had placed the elements in his periodic table in order of atomicweight, but the inertness of argon suggested a placement "before" the reactive alkali metal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Mendeleev started by comparing the atomic weights of elements. Mendeleev started comparing groups of elements based on their atomic properties and ordered them according to their atomic weights. Rutherford on this basis made the tentative suggestion that atomic nuclei are composed of numbers of helium nuclei, each with a charge corresponding to half of its atomicweight. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. He was the first scientist to see the periodicity of elements when they were arranged in order of their atomic weights. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Dalton estimated the atomic weights according to the mass ratios in which they combined, with the hydrogen atom taken as unity. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Richards was the first to show, by chemical analysis, that an element could have different atomic weights. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Mendeleev published his periodic table of all known elements (and predicted several new elements to complete the table, plus some corrected atomic weights) in 1869. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Cannizzaro argued that placing these metals in different categories had the beneficial result of eliminating certain anomalies when using their physical properties to deduce atomic weights. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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