radium

ra·di·um  (rd-m)

n. Symbol Ra

A rare, brilliant white, luminescent, highly radioactive metallic element found in very small amounts in uranium ores, having 13 isotopes with mass numbers between 213 and 230, of which radium 226 with a half-life of 1,622 years is the most common. It is used in cancer radiotherapy, as a neutron source for some research purposes, and as a constituent of luminescent paints. Atomic number 88; melting point 700°C; boiling point 1,737°C; valence 2. See Table at element.

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[Latin radius, ray + -ium.]

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radium [ˈreɪdɪəm]

n

(Chemistry / Elements & Compounds)

a.  a highly radioactive luminescent white element of the alkaline earth group of metals. It occurs in pitchblende, carnotite, and other uranium ores, and is used in radiotherapy and in luminous paints. Symbol: Ra; atomic no.: 88; half-life of most stable isotope, ²²⁶Ra: 1620 years; valency: 2; relative density: 5; melting pt.: 700°C; boiling pt.: 1140°C

b.  (as modifier) radium needle

[from Latin radius ray]

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radium  (rd-m)

Symbol Ra

A rare, bright-white, highly radioactive element of the alkaline-earth group. It occurs naturally in very small amounts in ores and minerals containing uranium, and it is naturally luminescent. Radium is used as a source of radon gas for the treatment of disease and as a neutron source for scientific research. Its most stable isotope is Ra 226 with a half-life of 1,622 years. Atomic number 88; melting point 700°C; boiling point 1,737°C; valence 2. See Periodic Table.

Thesaurus

Noun

1.

radium - an intensely radioactive metallic element that occurs in minute amounts in uranium ores atomic number 88, Ra metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. uranium ore - any ore from which uranium can be extracted

Translations

radium [ˈreɪdɪəm] N → radio m

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radium [ˈreɪdiəm] n → radium m

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radium

n → Radium nt; radium therapy or treatment (Med) → Radiumtherapie f

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radium [ˈreɪdɪəm] n → radio

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radium

n radium [ˈreidiəm]

a radioactive metallic element, used in treating certain diseases. radium راديوم: عُنْصُر فِلِزّي مُشِع радий rádium radium das Radium ράδιο radio raadium رادیوم radium radium רַדיוּם एक रेडियोधर्मी धातु radij rádium radium radíum radio ラジウム 라듐 radis rādijs radium radium radium rad rádio radiu радий rádium radij radijum radium ธาตุกัมมันตภาพรังสีชนิดหนึ่ง radyum (Ra) 鐳 радій ریڈیم دھات Rađi, nguyên tố kim loại phóng xạ 镭