Definitions for RADIUM
ˈreɪ di əmra·di·um

Princeton's WordNetRate this definition:0.0 / 0 votes

1. radium, Ra, atomic number 88noun

   an intensely radioactive metallic element that occurs in minute amounts in uranium ores

GCIDERate this definition:0.0 / 0 votes

1. Radiumnoun

   An intensely radioactive metallic element found (combined) in minute quantities in pitchblende, and various other uranium minerals. Symbol, Ra; atomic weight, 226.4. Radium was discovered by M. and Mme. Curie, of Paris, who in 1902 separated compounds of it by a tedious process from pitchblende. Its compounds color flames carmine and give a characteristic spectrum. It is divalent, resembling barium chemically. The main isotope of radium found in pitchblende, radium-226, has a half-life of 1620 years, decaying first by alpha emission to radon. Radium preparations are remarkable for maintaining themselves at a higher temperature than their surroundings, and for their radiations, which are of three kinds: alpha rays, beta rays, and gamma rays (see these terms). The beta and gamma rays seen in radium preparations are in fact due to disintegration of decay products of radium rather than the radium itself. By reason of these rays they ionize gases, affect photographic plates, cause sores on the skin, and produce many other striking effects. Their degree of activity depends on the proportion of radium present, but not on its state of chemical combination or on external conditions. The radioactivity of radium is therefore an atomic property, and is due to an inherent instability of the atomic nucleus which causes its decay in a process whose rate is first order. The disintegration of the radium nucleus is only the first in a series of nuclear disintegrations leading to production of a series of elements and isotopes. The chain has at least seven stages; the successive main products have been studied and are radon, a gaseous radioactive element belonging chemically to the inert noble gas series (originally called radium emanation or exradio, radium A, radium B, radium C, etc. The successive products are unstable isotopes of several different elements, each with an atomic weight a little lower than its predecessor. Lead is the stable end product. At the same time, the light gas helium is formed, being generated when the expelled alpha particles (positively charged helium nuclei) acquire electrons. Radium, in turn, is formed in the pitchblende ore by a slow disintegration of uranium. Natural radium and also an isotope (radium-228, also called mesothorium I) formed by the decay of thorium, were at one time used to make a luminous paint for watch dials, until the danger of the radioactivity became fully appreciated, and use of such material in watches was discontinued. See also mesothorium.

WiktionaryRate this definition:0.0 / 0 votes

1. radiumnoun

   a radioactive metallic chemical element (symbol Ra) with an atomic number of 88.

2. Etymology: radio- (from radioactive) + -ium

WikipediaRate this definition:0.0 / 0 votes

1. Radium

   Radium is a chemical element with the symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) upon exposure to air, forming a black surface layer of radium nitride (Ra3N2). All isotopes of radium are radioactive, the most stable isotope being radium-226 with a half-life of 1,600 years. When radium decays, it emits ionizing radiation as a by-product, which can excite fluorescent chemicals and cause radioluminescence. Radium, in the form of radium chloride, was discovered by Marie and Pierre Curie in 1898 from ore mined at Jáchymov. They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days later. Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne through the electrolysis of radium chloride in 1911.In nature, radium is found in uranium and (to a lesser extent) thorium ores in trace amounts as small as a seventh of a gram per ton of uraninite. Radium is not necessary for living organisms, and adverse health effects are likely when it is incorporated into biochemical processes because of its radioactivity and chemical reactivity. As of 2014, other than its use in nuclear medicine, radium has no commercial applications. Formerly, around the 1950s, it was used as a radioactive source for radioluminescent devices and also in radioactive quackery for its supposed curative power. These applications have become obsolete owing to radium's toxicity; as of 2020, less dangerous isotopes (of other elements) are instead used in radioluminescent devices.

ChatGPTRate this definition:0.0 / 0 votes

1. radium

   Radium is a naturally occurring radioactive element that is located in the periodic table with atomic number 88. It is silver-white in color, extremely dense and emits radiation in the form of alpha and beta particles, and gamma rays. It was discovered by Marie and Pierre Curie in 1898 and was historically used for medicinal and commercial purposes. However, due to its radioactive nature and associated health risks, its use is now more controlled and limited.

WikidataRate this definition:0.0 / 0 votes

1. Radium

   Radium is a chemical element with symbol Ra and atomic number 88. Radium is an almost pure-white alkaline earth metal, but it readily oxidizes on exposure to air, becoming black in color. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1601 years and decays into radon gas. Because of such instability, radium is luminescent, glowing a faint blue. Radium, in the form of radium chloride, was discovered by Marie Skłodowska-Curie and Pierre Curie in 1898. They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days later. Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne through the electrolysis of radium chloride in 1910. Since its discovery, it has given names like radium A and radium C2 to several isotopes of other elements that are decay products of radium-226. In nature, radium is found in uranium ores in trace amounts as small as a seventh of a gram per ton of uraninite. Radium is not necessary for living organisms, and adverse health effects are likely when it is incorporated into biochemical processes because of its radioactivity and chemical reactivity.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Radium

   Radium. A radioactive element of the alkaline earth series of metals. It has the atomic symbol Ra, atomic number 88, and atomic weight 226. Radium is the product of the disintegration of uranium and is present in pitchblende and all ores containing uranium. It is used clinically as a source of beta and gamma-rays in radiotherapy, particularly BRACHYTHERAPY.

The Foolish Dictionary, by Gideon WurdzRate this definition:0.0 / 0 votes

1. RADIUM

   A radiant radiator, redolent of ranging radial rays of radio-activity, raised to radical rates and regarded as a ruthless rake-off in the reign of riches within the arrayed radius of a raging, raving and raided race.

Matched Categories

1. • Metallic Element

Usage in printed sourcesFrom: 

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How to pronounce RADIUM?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say RADIUM in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of RADIUM in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of RADIUM in Pythagorean Numerology is: 3

Examples of RADIUM in a Sentence

1. Saudi Aramco:

   At 05:45 today a fire was reported in the basement of the Radium residential compound in Al Khobar which is leased by Saudi Aramco for its employees.

2. Marie Curie, Lecture at Vassar College, May 14, 1921:

   We must not forget that when radium was discovered no one knew that it would prove useful in hospitals. The work was one of pure science. And this is a proof that scientific work must not be considered from the point of view of the direct usefulness of it. It must be done for itself, for the beauty of science, and then there is always the chance that a scientific discovery may become like the radium a benefit for humanity.

3. Alfred North Whitehead:

   Through and through the world is infested with quantity. To talk sense is to talk quantities, It is no use saying the nation is large- how large? It is no use s aying that radium is scarce- how scarce? You can not evade quantity. You may fly to poetry and music and quantity and number will face you in your rhythms and your octaves.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=RADIUM
2. ^ GCIDE
   https://gcide.gnu.org.ua/?q=RADIUM
3. ^ Wiktionary
   https://en.wiktionary.org/wiki/Radium
4. ^ Wikipedia
   https://en.wikipedia.org/wiki/Radium
5. ^ ChatGPT
   https://chat.openai.com
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=RADIUM
7. ^ The Foolish Dictionary, by Gideon Wurdz
   https://www.gutenberg.org/cache/epub/1989/pg1989-images.html#:~:text=RADIUM
8. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=RADIUM