World's Oldest Periodic Table Found in Storage For electrons, the shell levels are full at 2 in the first, 8 in the second, and so forth. Overall, the numbers representing full-up electron shells ...

An international team of researchers, led by scientists from GSI/FAIR in Darmstadt, Germany, has studied r-process ...

But when we look at the full gamut of elements in the periodic table, there's one missing that you might have expected to be there: the 43rd one, Technetium, a shiny, gray metal as dense as lead ...

The elements were placed in the periodic table’s seventh row, which is above the row of lanthanides and the row of actinides. In the 1980s and 1990s, Roberto noted, scientists at the GSI Helmholtz ...

Eighty out of the first 82 elements in the periodic table have stable isotopes. Measuring and analysing their distribution allows for many practical applications. The IAEA assists Member States in ...

This is the second part of a three-part series written by Carolyn Krause. Many of the elements were synthesized using an Oak Ridge reactor.

Scientists have created six new isotopes of the superheavy elements, reaching in an unbroken chain of decays from element 114 down to rutherfordium. The discovery is a major step toward ...

Here’s how long the periodic table’s unstable elements last. Some of these isotopes have half-lives of seconds or less, while others last and last ...