Promethium is unique among the lanthanides because it is the only one that is:

Found in metallic form in nature

Radioactive with no stable isotopes

Promethium was first isolated and identified in 1945 by scientists at which laboratory?

Lawrence Berkeley National Laboratory

As a stable element in meteorites

As a major component of rare-earth minerals

Only in trace amounts from spontaneous fission of uranium and neutron-induced reactions

As a common isotope in seawater

Electrolytic refining of rare-earth ores

Separation from natural monazite sands

Isolation from fission products or neutron-irradiated uranium in reactors

Extraction from seawater using ion-exchange

Structural alloying agent for aircraft frames

Beta radiation sources for thickness gauges and betavoltaic batteries

Fuel for conventional combustion engines

Primary component in ordinary fluorescent lamps

Trivia · Knowledge

Eight questions on promethium's properties, discovery, occurrence, isotopes, and practical uses.0 takes

Preview · 8 questions

01What is the atomic number of promethium?
02Promethium is unique among the lanthanides because it is the only one that is:
03Promethium was first isolated and identified in 1945 by scientists at which laboratory?
04Which of the following promethium isotopes is most commonly used in practical applications (e.g., betavoltaic devices and luminous paint prototypes)?
05How does promethium primarily occur in nature?
06Which production method is used industrially to obtain promethium for applications?
07Approximately what is the half-life of the commonly used isotope Pm-147?
08Which of these is a documented practical application of promethium?