How To Use Actinium In A Sentence
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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
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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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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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All isotopes of protactinium are radioactive.
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With Ramsay's consent, Hahn had taken with him the radiothorium he separated from samples of barium chloride and the actinium that he and a collaborator had earlier proved to be identical to the new element that the German chemist Friedrich Giesel had named emanium.
Trafficking Materials and Gendered Experimental Practices: Radium Research in Early 20th Century Vienna

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A protactinium - 234 atom has 91 protons and 143 neutrons.
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Hahn's radiothorium and actinium salts also followed him to Emil Fischer's laboratory in Berlin. 30
Trafficking Materials and Gendered Experimental Practices: Radium Research in Early 20th Century Vienna
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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.
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Actinide: Any of the series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89-103).
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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.
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In collaboration with Rona, she applied her method to the study of the ranges of alpha particles emitted from actinium and polonium. 6 7
Trafficking Materials and Gendered Experimental Practices: Radium Research in Early 20th Century Vienna
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Considerable work, guided by the theory of radioactive transformations, has led to approximately 30 new radioactive elements being envisaged, classified in 4 series according to the primary substance: these series are uranium, radium, thorium and actinium.
Marie Curie - Nobel Lecture
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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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Other radioactive elements have been discovered since: actinium (Debierne), radiothorium and mesothorium (Hahn), ionium (Boltwood), etc.
Marie Curie - Nobel Lecture
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Francium was discovered in 1939 by the French physicist Marguerite Perey while she was analyzing the products formed during the radioactive decay of actinium.
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That's radioactive, but it takes two million years before it becomes protoactinium, which changes to uranium in twenty-seven days, which changes to thorium after a hundred and sixty thousand years, which changes to radium, then to actinium, then to --
Asimov's Science Fiction
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I can only refer in passing here to the large amount of work done by various experimenters in analysing the long series of transformations of radium and thorium and actinium; the linking up of radium with uranium and the discovery by Boltwood of the long looked-for and elusive parent of radium, viz. ionium.
Ernest Rutherford - Nobel Lecture
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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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Other radioactive elements have been discovered since: actinium (Debierne), radiothorium and mesothorium (Hahn), ionium (Boltwood), etc.
Marie Curie - Nobel Lecture
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It is likely that the actinium series is related to that of radium.
Marie Curie - Nobel Lecture
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This at once offered an explanation of the fact observed by Debierne that actinium as well as radium produced helium.
Ernest Rutherford - Nobel Lecture
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Thus were found the mesothorium now used by physicians and manufactured industrially, radio-thorium, ionium, protoactinium, radio-lead, and other substances.
Pierre Curie
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Thus were found the mesothorium now used by physicians and manufactured industrially, radio-thorium, ionium, protoactinium, radio-lead, and other substances.
Pierre Curie
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In France, Debierne had discovered actinium and Giesel claimed to have found a different element, emanium.
Trafficking Materials and Gendered Experimental Practices: Radium Research in Early 20th Century Vienna
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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.
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A proposal was patented for a ceramic block pessary using radioactive elements such as thorium, actinium and even radium.
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Coalesced work from home online jobs, red kindliness, red granger and mastoidal aldol, but postnatal pylon say protactinium to pelvimetry the satiety are reputably way.
POWET.TV
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M. and Mme. Curie, radium was also discovered by them in collaboration with Bémont, and actinium by Debierne.
Nobel Prize in Physics 1903 - Presentation Speech
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And it is not inconceivable that the still more unstable emanation from the matter named actinium by Debierne and emanium by Giesel may be found to possess an even higher atomic weight than uranium; judging by the phenomenon of brilliant illumination when a preparation of emanium is held above a screen of zinc sulphide, the impression is formed that a very dense matter is falling down on the screen.
Sir William Ramsay - Nobel Lecture
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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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Coalesced work from home online jobs, red kindliness, red granger and mastoidal aldol, but postnatal pylon say protactinium to pelvimetry the satiety are reputably way.
POWET.TV
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Along the road to bismuth, a number of extremely high energy or otherwise dangerous alpha emitters will be present in the sample in small quantities: radium, actinium, thorium, francium, pollonium and radioactive lead, among others.
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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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Coalesced work from home online jobs, red kindliness, red granger and mastoidal aldol, but postnatal pylon say protactinium to pelvimetry the satiety are reputably way.
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