Share this entry

Share this page

promethium

Saltos de línea: pro|me¦thium
Pronunciación: /prəˈmiːθɪəm
 
/

Definición de promethium en inglés:

sustantivo

[mass noun]
The chemical element of atomic number 61, a radioactive metal of the lanthanide series. It was first produced artificially in a nuclear reactor and occurs in nature in traces as a product of uranium fission. (Symbol: Pm)
Example sentences
  • Finally in 1945, scientists isolated promethium from uranium fission products purified by ion-exchange chromatography.
  • In fact, the elements with atomic numbers 43, 61, and 85 (technetium, promethium, and astatine, respectively) were unknown on earth until some of their radioactive isotopes had been produced synthetically.
  • The only missing one was element number 61, which was eventually isolated from the debris of the radioactive decay of uranium and given the name of promethium, after the Greek god who gave man fire.

Origen

1940s: modern Latin, from the name of the Titan Prometheus.

Definición de promethium en:

Share this entry

Share this page

 

¿Qué te llama la atención de esta palabra o frase?

Obtenga más de Oxford Dictionaries

Suscribirse para eliminar anuncios y acceder a los recursos premium

Palabra del día vigesimal
Pronunciación: vɪˈdʒɛsɪm(ə)l
adjective
relating to or based on the number twenty