A milestone in the international Avogadro project coordinated by the Physikalisch-Technische Bundesanstalt (PTB) has been reached: With the aid of a single crystal of highly enriched 28Si, the ...
Contrary to the beliefs of generations of chemistry students, Avogadro’s number—the number of particles in a unit known as a mole—was not discovered by Amadeo Avogadro (1776-1856). Avogadro was a ...
Just like all of the other units, the kilogram will be defined via a natural constant as of May 2019. A constant was selected for this whose unit contains the kg and whose value can be measured with ...
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