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 …

2 days ago · Promethium (Pm), atomic number 61, is an extremely rare metallic element and a member of the lanthanide series, often called rare earth metals. Unlike its neighbors, Promethium is …

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 …

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 …

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 …

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 …

Jul 10, 2020 · Promethium (Pm), element #61, got its name from the Greek Titan Prometheus, who stole fire from Zeus and passed it to people. The only element in the lanthan...

Promethium (pronounced as pro-MEE-thee-em) is a radioactive metal with the chemical symbol Pm, belonging to the family of lanthanides as it does not exist naturally in the earth’s crust [1, 3].