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 ...

Scientific research has discovered some elements that stand out due to their exceptional density and atomic weight. They make up the heaviest metals on earth and are used in various fields.

For example, you may have a card that says that the atom you are looking for has 5 neutrons. You would look at the periodic table to find an atom that you could add 5 to its number of protons that ...

A force that couples electrons and neutrons could be an addition to the Standard Model, and a new study places an upper limit ...

THAT the intra-atomic charge of an element is determined by its place in the periodic table rather than by its atomic weight, as concluded by A. van der Broek (NATURE, November 27, p. 372), is ...

All the latest science news on atomic mass from Phys.org. Find the latest news, advancements, and breakthroughs.