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.

For the first time, scientists have characterized a promethium coordination complex, advancing the understanding of ...

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

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 ...

a long-time Y-12 mission starting with uranium isotopes during the war. The periodic table included promethium and three newly discovered elements heavier than uranium - americium, curium and ...

ISOTOPES. Soddy first drew attention to this and similar cases of radioactive elements that are chemically identical, and since they must occupy the same place in the Periodic Table he has ...