Definitions of protactinium in English
noun
(1) A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
Examples of protactinium in English
(1) All isotopes of protactinium are radioactive.
(2) A protactinium - 234 atom has 91 protons and 143 neutrons.
(3) Along the way, these disintegration series produce radioactive isotopes of protactinium , thorium, actinium, radium, francium, radon, astatine, polonium, bismuth, lead, thallium and mercury.
(4) The dates of discovery of these elements as 1789 for uranium, 1829 for thorium, 1899 for actinium and 1913 for protactinium .
(5) A new method of radioactive tracing involves the use of a new clock, based on the radioactive decay of uranium - 235 to protactinium - 231.
synonyms of protactinium
pa
protoactinium
