Promethium is a chemical element; it has symbol Pm and atomic number 61. All of its isotopes are radioactive; it is extremely rare, with only about 500–600 grams naturally occurring in the Earth's …

promethium (Pm), chemical element, the only rare-earth metal of the lanthanide series of the periodic table not found in nature on Earth.

Promethium is named after Prometheus of Greek mythology who stole fire from the Gods and gave it to humans. The image is based on a scene from an Ancient Greek vase. It depicts the god Atlas …

May 11, 2025 · Promethium is a radioactive metal discovered in 1945 that is extremely rare on Earth. All promethium isotopes are radioactive, and they can produce x-rays through beta decay. Promethium …

Apr 8, 2025 · Promethium (symbol Pm and atomic number 61) is a rare earth element and one of only two elements with atomic numbers under 83 that have no stable isotopes (the other is technetium). It …

Promethium shows promise as a portable X-ray source, and it may become useful as a heat source to provide auxiliary power for space probes and satellites. More than 30 promethium compounds have …

Oct 18, 2022 · Promethium is the only rare earth metal that is radioactivity. In the dark it will produce a pale blue glow due to its radioactivity. Promethium has uses as a source of beta particles and is used …

Chemical element, Promethium, information from authoritative sources. Look up properties, history, uses, and more.

Promethium is one of the most fascinating of all chemical elements. It has never been found on the Earth's surface. Scientists know of it only because it can be prepared artificially in particle …

Explore the fascinating world of Promethium, a rare and radioactive lanthanide. Learn about its unique properties, industrial uses like luminous paints and atomic batteries, its potential medical …