"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The Periodic Table of Elements is a testament to the many millennia of human exploration of the chemical ...

For the first time, scientists have revealed crucial properties of the mysterious, radioactive substance promethium — nearly eight decades after the elusive rare earth element was discovered.

Promethium was discovered in 1945 at Clinton Laboratories, now the Department of Energy's Oak Ridge National Laboratory, and continues to be produced at ORNL in minute quantities. Some of its ...

Chemists achieve synthetic feat with radioactive promethium for the first time. “It’s a tour de force,” says Polly Arnold, a chemist at Lawrence Berkeley National Laboratory in Berkeley, California, ...

Named for the Greek Titan who stole fire from Zeus and gave it to humanity, glow-in-the-dark promethium is a highly radioactive, rare earth element. It is not found anywhere on Earth and is found in ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Although the Periodic Table of Elements is an impressive achievement of human understanding, scientists ...

Although the Periodic Table of Elements is an impressive achievement of human understanding, scientists are still finding secrets about certain elements among its carefully arranged rows and columns.