Definition of promethium in English:

promethium

noun prəˈmiːθɪəmprəˈmiθiəm

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.
（化学元素）钷（符号： Pm ）
Example sentencesExamples
- Finally in 1945, scientists isolated promethium from uranium fission products purified by ion-exchange chromatography.
- 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.
- 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.

Origin

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

Definition of promethium in US English:

promethium

nounprəˈmēTHēəmprəˈmiθiəm

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.
（化学元素）钷（符号： Pm ）
Example sentencesExamples
- 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.

Origin

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

词汇	promethium
释义	Definition of promethium in English: promethium noun prəˈmiːθɪəmprəˈmiθiəm 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. （化学元素）钷（符号： Pm ） Example sentencesExamples Finally in 1945, scientists isolated promethium from uranium fission products purified by ion-exchange chromatography. 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. 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. Origin 1940s: modern Latin, from the name of the Titan Prometheus. Definition of promethium in US English: promethium nounprəˈmēTHēəmprəˈmiθiəm 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. （化学元素）钷（符号： Pm ） Example sentencesExamples 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. Origin 1940s: modern Latin, from the name of the Titan Prometheus.
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