- Promethium is a
radioactive chemical element with the symbol Pm and atomic number 61
and It salts has a pink or red colour that colours the surroundings
air with a pale blue-green light.
- Promethium is useful
as a beta source for thickness gauges. It is also used in atomic
batteries for spacecraft and guided missiles.
- Promethium is harmful
due to its radioactivity.
- Promethium has 29
whose half-lives are known, with mass numbers from 130 to 158.
Promethium has no naturally occurring isotopes.
- Its longest lived
isotopes are 145Pm with a half-life of 17.7 years and 147Pm, with a
half-life of 2.6234 years.
No comments:
Post a Comment