Standard atomic weights, those numbers emblazoned under the elements on the periodic table, were once thought of as unchanging constants of nature. But researchers have tweaked the atomic weights of ...

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 ...

Time to update all your periodic tables. https://gizmodo.com/minimalist-periodic-table-brings-simplicity-to-the-elem-1108039094 https://gizmodo.com/damn-this-periodic ...

Nuclear physicists at RIKEN have measured the mass of a neutron-rich nucleus of the element palladium to a greater accuracy than ever before. When this mass is fed into models of merging neutron stars ...

Conventional neutron numbers are based on the approximations that the mass of the electron is zero and that those of the proton and neutron are each equal to unity. It was shown, by using the exact ...

Atoms of different elements usually have different mass numbers, but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40. The symbol for an atom can be ...

Could super-heavy elements be lurking in plain sight? One group of physicists says that they are, and claims to have seen the heaviest element yet found hiding amongst thorium atoms. Some theories ...

Ten elements that help make up the universe, including the carbon our biology is based on and the oxygen in the air we breathe, are now getting changed in an unprecedented way — they are getting their ...