mendelevium

men·de·le·vi·um

M0214900 (mĕn′də-lē′vē-əm)n. Symbol Md A synthetic radioactive transuranic element of the actinide series that has known isotopes with mass numbers ranging from 245 to 262. The isotopes with the longest half-lives are Md-258 (51.5 days) and Md-260 (31.8 days). Atomic number 101; melting point 827°C; valence 2,3. See Periodic Table.

[After Dmitri Ivanovich Mendeleev.]

mendelevium

(ˌmɛndɪˈliːvɪəm) n (Elements & Compounds) a transuranic element artificially produced by bombardment of einsteinium. Symbol: Md; atomic no: 101; half-life of most stable isotope, ²⁵⁸Md: 60 days (approx.); valency: 2 or 3[C20: named after D. I. Mendeleyev]

men•de•le•vi•um

(ˌmɛn dlˈi vi əm)

n. a transuranic element. Symbol: Md, Mv; at. no.: 101. [1950–55; after Dutch. I. Mendeleev; see -ium²]

men·de·le·vi·um

(mĕn′də-lē′vē-əm) Symbol Md A synthetic, radioactive metallic element of the actinide series that is produced by bombarding einsteinium with helium ions. Its most stable isotope has a half-life of about two months. Atomic number 101. See Periodic Table.

Thesaurus

Noun

mendelevium - a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)atomic number 101, Md, Mvchemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

Translations

mendelevium

enUK

mendelevium

(mĕndəlāv`ēəm), artificially produced radioactive chemical element; symbol Md; at. no. 101; mass no. of most stable isotope 258; m.p. 827&degC;; b.p. and sp. gr. unknown; valence +1, +2, +3. Mendelevium is a metal of the actinide seriesactinide series,
a series of radioactive metallic elements in Group 3 of the periodic table. Members of the series are often called actinides, although actinium (at. no. 89) is not always considered a member of the series.
..... Click the link for more information. in Group 3 of the periodic tableperiodic table,
chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled
..... Click the link for more information. . The ninth transuranium elementtransuranium elements,
in chemistry, radioactive elements with atomic numbers greater than that of uranium (at. no. 92). All the transuranium elements of the actinide series were discovered as synthetic radioactive isotopes at the Univ.
..... Click the link for more information. to be discovered, it is named for the Russian chemist Dmitri Ivanovich MendeleevMendeleev, Dmitri Ivanovich
, 1834–1907, Russian chemist. He is famous for his formulation (1869) of the periodic law and the invention of the periodic table, a classification of the elements; with Lothar Meyer, who had independently reached similar conclusions, he was
..... Click the link for more information. . The symbol Mv was used at first, but it was changed to Md in 1963. Sixteen isotopes of mendelevium are known. Mendelevium-256 (half-life about 76 min) was the first isotope produced; it was detected in 1955 by Albert Ghiorso, Bernard G. Harvey, Gregory R. Choppin, Stanley G. Thompson, and Glenn T. SeaborgSeaborg, Glenn Theodore
, 1912–99, American chemist, b. Ishpeming, Mich., grad. Univ. of California at Los Angeles, 1934, Ph.D. Univ. of California at Berkeley, 1937.
..... Click the link for more information. , who produced it one atom at a time by bombarding einsteinium-253 with alpha particles in a cyclotron at the Univ. of California at Berkeley. This technique of producing and detecting single atoms has become the standard for the discovery of the elements beyond mendelevium in the periodic table. Little is known of the properties of this element, since its isotopes are unstable and difficult to produce. Mendelevium-258 (the most stable isotope) has a half-life of 51.5 days; its synthesis (by bombarding einsteinium-255 with alpha particles) may make possible studies of the physical and chemical properties of the element.

mendelevium

[‚men·də′lē·vē·əm] (chemistry) Synthetic radioactive element, symbol Md, with atomic number 101; made by bombarding lighter elements with light nuclei accelerated in cyclotrons.

mendelevium

a transuranic element artificially produced by bombardment of einsteinium. Symbol: Md; atomic no.: 101; half-life of most stable isotope, ²⁵⁸Md: 60 days (approx.); valency: 2 or 3

mendelevium

(Md) [men″dĕ-le´ve-um] a chemical element, atomic number 101, atomic weight 256. (See Appendix 6.)

men·de·le·vi·um (Md),

(men'dĕ-lē'vē-ŭm), An element, atomic no. 101, atomic wt. 258.1, prepared in 1955 by bombardment of einsteinium with alpha particles. [D. Mendeléeff]

men·de·le·vi·um

(men-dĕ-lē'vē-ŭm) An element, atomic no. 101, atomic wt. 258.1, prepared in 1955 by bombardment of einsteinium with alpha particles. [D. Mendeléeff]

Mendeléeff,

Dimitri (Dmitri) I., Russian chemist, 1834-1907. Mendeléeff law - the properties of elements are periodical functions of their atomic weights. Synonym(s): periodic lawmendelevium - an element, atomic No. 101, atomic weight 258.1, prepared in 1955 by bombardment of einsteinium with alpha particles.

mendelevium

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mendelevium

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men·de·le·vi·um (Md),

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Mendeléeff,

mendelevium

Synonyms for mendelevium

noun a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)

Synonyms

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