Carolyn Krause presents the second part of the three-part series on the Oak Ridge National Laboratory's role in the discovery of elements in the periodic table. Many of them have been synthesized ...

"This is probably the first time these isotopes have existed on the surface of the Earth." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

In a letter to the editor published in the Dec. 4, 1913, issue of Nature, English radiochemist Frederick Soddy proposed the isotope concept—that elements could have more than one atomic weight. The ...

For new, human-made heavy elements on the periodic table, being “too ‘big’ for your own good” often means instability and a fleeting existence. The more protons and neutrons scientists squeeze ...

In 1930, Ernest Lawrence invented the cyclotron, which later developed into a general method for isotope separation based on ionization of atoms with electrons, and separation by the charge-to-mass ...

Isotopic analysis primarily involves the separation of isotopes based on the significant differences in mass. The method is effective for identifying the isotopic signature within the inorganic and ...