The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the ...

Figure 1: Schematic illustration of the components of matter ejected from neutron-star mergers. The characteristic luminosity of the kilonova is approximately equal to the radioactive heating rate at ...

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 ...

Hunting for the universe’s heaviest atoms just got a little easier, thanks to a new technique that directly measures the mass of elements heavier than uranium. The method could help find an “island” ...

Update: This article was updated on Sept. 11, 2017 by Rachel Ross, Live Science Contributor. Imagine plopping an atom down on a scale. As you do so, skin cells that are trillions of atoms thick flake ...

A pinch of arsenic, a dash of krypton, a soupçon of tantalum, and a whole load of copper—these are just some of the 76 chemical elements that go into making modern automobiles, according to an ...