atomic-weight

Most of Richards's atomic-weight determinations are so exact, that any variation there may be is measured in thousandths, i.e. is of the same degree of magnitude as the apparent volumes of the electrons.

Nobel Prize in Chemistry 1914 - Presentation 1966

Berzelius, the great pioneer in the department of atomic-weight determination, there is assuredly no one investigator who has contributed anything like so much as Richards, either in bulk or scope, towards the development of experimental stoichiometry.

Nobel Prize in Chemistry 1914 - Presentation 1966

The fact deserves mention that the said instrument, in addition to its serviceability for atomic-weight determination, has been made use of in several different departments of chemical and physical analysis.

Nobel Prize in Chemistry 1914 - Presentation 1966

Richards demonstrated, however, that the chemical operations that have to be resorted to in an atomic-weight determination give rise, as a rule, to more numerous and less easily controllable sources of error than do the purely mechanical processes and the readings of weights recorded, and made it clear that the value of the latter, however important they are in themselves, incurred the risk of becoming illusory because of uncertainties in the readings.

Nobel Prize in Chemistry 1914 - Presentation 1966

It is well known that throughout the last three decades of the nineteenth century Stas's atomic-weight determinations had the repute of being of well-nigh unassailable precision; nor did Richard himself apparently, to begin with, consider it requisite to subject them to a thorough-going re-testing process, being disposed rather to accept them as authoritative as long as he could.

Nobel Prize in Chemistry 1914 - Presentation 1966

Stas in his time developed to a high degree of perfection the mechanico-physical manipulations that form a feature of the technical process of atomic-weight determination.

Nobel Prize in Chemistry 1914 - Presentation 1966

Chemistry's IUPAC Commission on Isotopic Abundances and Atomic Weights, which oversees the evaluation and dissemination of atomic-weight values.

Yahoo! News: Business - Opinion 2010

For instance, "boron in seawater has a very narrow atomic-weight range, so I could select a value of 10.818," research chemist Tyler Coplen, director of the

Yahoo! News: Business - Opinion 2010

Moreover, in almost every one of Richards 'treatises there are to be found descriptions of methods and manipulations that mark noteworthy improvements as compared with those practised before his day, and prove likewise that, in the course of his able and consistently pursued appropriation of the aids and resources, both theoretical and technical, that modern times have evolved, he has been capable of entirely transforming the methodics of atomic-weight determination to suit his purposes, in a way that cannot fail to be of utility to other investigators too in this particular field of labour.

Nobel Prize in Chemistry 1914 - Presentation 1966

The scientific world has moreover accorded them an ever-growing need of recognition, which from 1909 onwards may be said to have borne an official stamp, for in that year the atomic weights established by Richards and his school were accepted to the fullest extent by the international commission, which had been charged with the tasks of critically reviewing the recent advances made in stoichiometry and of drawing up year by year an atomic-weight table for general use based upon the results of that review.

Nobel Prize in Chemistry 1914 - Presentation 1966