AskDefine | Define mendelevium

Dictionary Definition

mendelevium n : a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol) [syn: Md, Mv, atomic number 101]

User Contributed Dictionary

see Mendelevium

English

Etymology

Named for Dmitri Mendeleev

Noun

  1. A transuranic chemical element (symbol Md, formerly Mv) with atomic number 101.

Synonyms

Related terms

Translations

External links

For etymology and more information refer to: http://elements.vanderkrogt.net/elem/md.html (A lot of the translations were taken from that site with permission from the author)

Finnish

Noun

  1. mendelevium

Extensive Definition

Mendelevium ()) is a synthetic element with the symbol Md (formerly Mv) and the atomic number 101. A metallic radioactive transuranic element of the actinides, mendelevium is synthesized by bombarding einsteinium with alpha particles and was named after Dmitri Mendeleev.

Notable characteristics

Researchers have shown that mendelevium has a moderately stable dipositive (II) oxidation state in addition to the more characteristic (for actinide elements) tripositive (III) oxidation state. 256Md has been used to find out some of the chemical properties of this element while in an aqueous solution. There are no other uses of mendelevium and only trace amounts of the element have ever been produced.

History

Mendelevium (for Dmitri Mendeleev, surname commonly spelt as Mendeleev, Mendeleyev, Mendeléef, or even Mendelejeff, and first name sometimes spelt as Dmitry or Dmitriy) was first synthesized by Albert Ghiorso (team leader), Glenn T. Seaborg, Bernard Harvey, Greg Choppin, and Stanley G. Thompson in early 1955 at the University of California, Berkeley. The team produced 256Md (half-life of 76 minutes) when they bombarded an 253Es target with alpha particles (helium nuclei) in the Berkeley Radiation Laboratory's 60-inch cyclotron (256Md was the first element to be synthesized one-atom-at-a-time). Element 101 was the ninth transuranic element synthesized. Contrary to some descriptions, it was never known as "unnilunium".

Isotopes

15 radioisotopes of mendelevium have been characterized, with the most stable being 258Md with a half-life of 51.5 days, 260Md with a half-life of 31.8 days, and 257Md with a half-life of 5.52 hours. All of the remaining radioactive isotopes have half-lives that are less than 97 minutes, and the majority of these have half-lives that are less than 5 minutes. This element also has 1 meta state, 258mMd (t½ 57 minutes). The isotopes of mendelevium range in atomic weight from 245.091 u (245Md) to 260.104 u (260Md).

References

External links

mendelevium in Arabic: مندليفيوم
mendelevium in Azerbaijani: Mendeleyevum
mendelevium in Bengali: মেন্ডেলেভিয়াম
mendelevium in Belarusian: Мендзялевій
mendelevium in Bosnian: Mendeljejevijum
mendelevium in Catalan: Mendelevi
mendelevium in Czech: Mendelevium
mendelevium in Corsican: Mendeleviu
mendelevium in Danish: Mendelevium
mendelevium in German: Mendelevium
mendelevium in Estonian: Mendeleevium
mendelevium in Modern Greek (1453-): Μεντελέβιο
mendelevium in Spanish: Mendelevio
mendelevium in Esperanto: Mendelevio
mendelevium in Basque: Mendelebio
mendelevium in Persian: مندلویوم
mendelevium in French: Mendélévium
mendelevium in Friulian: Mendelevi
mendelevium in Manx: Mendelevium
mendelevium in Galician: Mendelevio
mendelevium in Korean: 멘델레븀
mendelevium in Armenian: Մենդելեվիում
mendelevium in Croatian: Mendelevij
mendelevium in Italian: Mendelevio
mendelevium in Hebrew: מנדלביום
mendelevium in Javanese: Mendelevium
mendelevium in Latin: Mendelevium
mendelevium in Latvian: Mendeļejevijs
mendelevium in Luxembourgish: Mendelevium
mendelevium in Lithuanian: Mendelevis
mendelevium in Lojban: jinmrmendelevi
mendelevium in Hungarian: Mendelévium
mendelevium in Malayalam: മെന്‍ഡെലീവിയം
mendelevium in Dutch: Mendelevium
mendelevium in Japanese: メンデレビウム
mendelevium in Norwegian: Mendelevium
mendelevium in Norwegian Nynorsk: Mendelevium
mendelevium in Polish: Mendelew
mendelevium in Portuguese: Mendelévio
mendelevium in Russian: Менделевий
mendelevium in Sicilian: Mendeleviu
mendelevium in Slovak: Mendelevium
mendelevium in Slovenian: Mendelevij
mendelevium in Serbian: Мендељејевијум
mendelevium in Serbo-Croatian: Mendeljejevijum
mendelevium in Finnish: Mendelevium
mendelevium in Swedish: Mendelevium
mendelevium in Thai: เมนเดลีเวียม
mendelevium in Turkish: Mendelevyum
mendelevium in Ukrainian: Менделєвій
mendelevium in Chinese: 钔
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