Thank you for bringing to my attention the recent International Union of Pure & Applied Chemistry report “Atomic weights of the elements 2009” (C&EN, Dec. 20 ...

Nineteen elements on the periodic table — including gold, cadmium, arsenic and aluminum — are getting their atomic weights adjusted. The International Union of Pure and Applied Chemistry (IUPAC) ...

Ytterbium is a bit lighter than previously thought: Its standard atomic weight is now 173.045, down from 173.054, as approved by the International Union of Pure & Applied Chemistry (IUPAC) in August.

The film demonstrates the determination of the atomic weight of copper through experimental methods. It explains the importance of atomic weights in chemistry and illustrates the process using the law ...

"Transfer of atomic mass with a photon solves the momentum paradox of light." ScienceDaily. www.sciencedaily.com / releases / 2017 / 06 / 170630085627.htm (accessed September 29, 2025).

In a new study led by Oxford University's Department of Chemistry, chemists have demonstrated the synthesis of a cyclocarbon that is stable enough for spectroscopic characterization in solution at ...

IN a paper on the absorption of Röntgen rays (Journal de Physique, p. 653, 1901) M. Benoist shows the connection between the transparency to X-rays of elementary substances and the atomic weight of ...