英语词汇“actinium”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

actinium

/akˈtɪnɪəm

noun [mass noun]

The chemical element of atomic number 89, a radioactive metallic element of the actinide series. It is rare in nature, occurring as an impurity in uranium ores. (Symbol: Ac) Along the way, these disintegration series produce radioactive isotopes of protactinium, thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury....

Actinides - the radioactive chemical elements that span from actinium to lawrencium on the periodic table - have generated a great deal of interest in recent years.
The first four actinide elements, actinium, thorium, protactinium and uranium are naturally occurring and have been known for a considerable time.

Origin

Early 20th century: from Greek aktis, aktin- 'ray' + -ium.

单词	actinium
释义	actinium /akˈtɪnɪəm / noun [mass noun] The chemical element of atomic number 89, a radioactive metallic element of the actinide series. It is rare in nature, occurring as an impurity in uranium ores. (Symbol: Ac) Along the way, these disintegration series produce radioactive isotopes of protactinium, thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury.... Actinides - the radioactive chemical elements that span from actinium to lawrencium on the periodic table - have generated a great deal of interest in recent years. The first four actinide elements, actinium, thorium, protactinium and uranium are naturally occurring and have been known for a considerable time. Origin Early 20th century: from Greek aktis, aktin- 'ray' + -ium. Rhymes aluminium, condominium, delphinium
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actinium

Origin

Rhymes