Into the early 1900s, prominent scientists were unsure about the existence of atoms. Jean Perrin’s calculations of Avogadro’s ...
An ongoing international effort to redefine the kilogram by 2018 has been helped by recent efforts from a team researchers from Italy, Japan and Germany to correlate two of the most precise ...
Determining the Avogadro constant with unprecedented accuracy demands a rigorous integration of complementary measurement strategies. Central to this endeavour is the x-ray crystal density method, ...
How much is a kilogram? It turns out that nobody can say for sure, at least not in a way that won’t change ever so slightly over time. The official kilogram – a cylinder cast 118 years ago from ...
The Avogadro constant—the number of atoms in one mole of an element—provides a link between the atomic and macroscopic properties of matter. One state-of-the-art method for improving the accuracy of ...
As cheat sheets go, it is a long one. Every four years, a task force of the Committee on Data for Science and Technology (CODATA), headquartered in Paris, releases a short-hand description of the ...
An ongoing international effort to redefine the kilogram by 2018 has been helped by recent efforts from a team researchers from Italy, Japan and Germany to correlate two of the most precise ...
The Avogadro constant—the number of atoms in one mole of an element—provides a link between the atomic and macroscopic properties of matter. One state-of-the-art method for improving the accuracy of ...
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