How heavy can an element be? An international team of researchers has found that ancient stars were capable of producing elements with atomic masses greater than 260, heavier than any element on the ...

The overwhelming majority of the universe’s matter that we can see consists of hydrogen and helium. To create heavier elements, stars must do the heavy lifting of assembling their atomic nuclei.

Rare-earth elements are a set of metallic elements in the periodic table. Chemists usually refer to a group of 17 elements when they use this label: the 15 lanthanides from lanthanum to lutetium, and ...