How does one go about measuring the mass of an object? Mass is defined as the amount of matter an object contains. This is very different from weight, of course, as the mass of our object would remain ...

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) ...

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 ...

Researchers developed a method to accurately calculate atomic forces for elements with high atomic numbers with quantum Monte Carlo simulations Ishikawa, Japan-- Atomic forces are primarily ...