[
UK
/pɹˌəʊtɐktˈɪniəm/
]
NOUN
- a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
How To Use protactinium In A Sentence
- An element discovered in 1982 has been named meitnerium to honor Lise Meitner (1878-1968), the Austrian-Swedish physicist and mathematician who discovered the element protactinium and made major contributions to the understanding of nuclear fission. Elements
- The dates of discovery of these elements as 1789 for uranium, 1829 for thorium, 1899 for actinium and 1913 for protactinium.
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- The first four actinide elements, actinium, thorium, protactinium and uranium are naturally occurring and have been known for a considerable time.
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- Along the way, these disintegration series produce radioactive isotopes of protactinium, thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury.
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- A new method of radioactive tracing involves the use of a new clock, based on the radioactive decay of uranium - 235 to protactinium - 231.
- Along the way, these disintegration series produce radioactive isotopes of protactinium, thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury.
- All isotopes of protactinium are radioactive.
