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 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 …

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

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 was discovered in 1945. It was the last rare earth lanthanide element to be discovered. It is very radioactive element but unstable. It is used in luminous paint and atomic batteries.

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 …

Searches for the element on earth have been fruitless, and it now appears that promethium is completely missing from the earth's crust. Promethium, however, has been identified in the spectrum …

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 …

May 22, 2024 · Promethium is very rare; only about a pound occurs naturally in the Earth’s crust at any given time. Unlike other rare earth elements, only minute quantities of synthetic promethium are …

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