How To Use Atomic weight In A Sentence
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There then followed a redetermination of almost all of the other atomic weights arrived at by Stas (with the exception of carbon), and these too, in the majority of cases, were found to require exchanging for more exact values.
Nobel Prize in Chemistry 1914 - Presentation
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The equivalent can however be determined very accurately, and we have seen that it is some multiple or submultiple of the true atomic weight.
An Elementary Study of Chemistry
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The atomic weight is a ratio quite distinct from the weight in grams.
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Consequently, other atomic weights calculated by reference to oxygen also remained debatable.
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Taking the atomic weight of uranium as 238.5, the atomic weight of ionium should be 230.5, of radium 226.5, of the emanation 222.5, and so on.
Ernest Rutherford - Nobel Lecture
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For the next two years, they continued to copublish on the atomic weights of uranium, thorium, and ionium. 86 In addition, their research showed that ionium was not a separate element but just an isotope of thorium.
Trafficking Materials and Gendered Experimental Practices: Radium Research in Early 20th Century Vienna
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Radium is an element resembling calcium, strontium, and barium in chemical properties; its atomic weight was determined by Mme. Curie, and found to be about 225, according to her first experiments; a redetermination gave a slightly higher value, which has been confirmed by a further investigation carried out by Sir T.E. Thorpe.
Alchemy: Ancient and Modern
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And it is not inconceivable that the still more unstable emanation from the matter named actinium by Debierne and emanium by Giesel may be found to possess an even higher atomic weight than uranium; judging by the phenomenon of brilliant illumination when a preparation of emanium is held above a screen of zinc sulphide, the impression is formed that a very dense matter is falling down on the screen.
Sir William Ramsay - Nobel Lecture
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Let it suffice to call to mind how it proved possible to produce from certain thorium minerals lead with precisely the same chemical properties as ordinary lead, but with considerably higher atomic weight - that is to say, an isotope to lead.
Nobel Prize in Chemistry 1921 - Presentation Speech
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It is evident, therefore, that the real atomic weight of an element must be some multiple or submultiple of the equivalent; in other words, the equivalent multiplied by 1/2, 1, 2, or 3 will give the atomic weight.
An Elementary Study of Chemistry
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He found that when he arranged the elements in order of increasing atomic weight, similar properties were repeated at regular intervals; they displayed periodicity.
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This device measures the atomic weight, or mass, as well as the prevalence of various atoms or molecules, and it scans the components one at a time.
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With these precautions, the weight of silver deposited in the silver coulometer was found to bear the same relation to the weight of copper deposited in the copper coulometer as the atomic weight of silver bears to one-half the new atomic weight of copper, within a reasonable limit of error.
Theodore W. Richards - Nobel Lecture
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This selection of elements also reveals the increase in atomic weight over atomic number.
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The sum of the masses of protons and neutrons is the atomic weight of the atom.
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We can tell how the elements of high atomic weight, such as uranium and thorium, are constantly giving off particles and are thus by loss or decomposition being changed over into other elements, such as radium, niton, polonium and lead.
Q. E. D., or New Light on the Doctrine of Creation
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Carbon has three naturally occurring isotopes, that is, atoms of the same atomic number but different atomic weights.
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To calculate the moles of nitrogen in each sample, core segment dry mass was multiplied by its nitrogen percentage and divided by nitrogen's atomic weight.
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By this means there is attained what is known as a mass spectrogram, that is to say a series of lines in which each line corresponds to a certain atomic weight, and where the numerical value of each atomic weight can be read off from the distance of the line from the line or lines which are produced by any fundamental substance that is chosen as a standard - usually carbon-12 or oxygen-16.
Nobel Prize in Chemistry 1922 - Presentation Speech
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The atomic weight of an element - the quantity chemists could weigh with scales and balances - depends on the number of protons and neutrons, which have virtually equal masses.
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Dalton's application of the Greek atomic theory to the facts established by the analyses of compounds enabled him to attach to each element a number which he called the atomic weight of the element, and to summarise all the facts concerning the compositions of compounds in the statement, that the elements combine in the ratios of their atomic weights, or in the ratios of whole multiples of their atomic weights.
The Story of Alchemy and the Beginnings of Chemistry
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The most common moderators are substances of low atomic weight such as heavy water (deuterium oxide) or graphite.
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The expulsion of an - particle therefrom decreases the atomic weight by 4 units, necessitates (since the - particle carries two positive charges) the removal of two electrons from the shell in order to maintain electrical neutrality, and hence changes the chemical nature of the body, transmuting the element into one occupying a position two places to the left in the periodic system (for example, the change of radium into niton).
Alchemy: Ancient and Modern
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Carbon has three naturally occurring isotopes, that is, atoms of the same atomic number but different atomic weights.
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I don't know, exactly what alloys you mean, but bismuth is common, and is heavier than lead in atomic weight.
Going by atomic weight, the alloys used in non-toxic shot are atom-for-atom lighter than lead.
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In 1913 Richards had discovered that the atomic weight of natural lead and of that formed in radioactive decay of uranium minerals differ.
The Nobel Prize in Chemistry: The Development of Modern Chemistry
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The atomic weight is a ratio quite distinct from the weight in grams.
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He called atoms of the second group isotopes, atoms of the same element with different atomic weights.
