A mole is a measurement of a ‘batch’ of particles. It is easier to describe the number of moles of a substance rather than the number of atoms as atoms are very small. Relative atomic mass is the ...

For the first time those little numbers that appear beneath some of the commonest elements in the periodic table boxes are about to change from a single value to an interval of numbers An ...

"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).

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 ...

Two physicists at the University of Stuttgart have proven that the Carnot principle, a central law of thermodynamics, does ...