Mendelevium


Mendelevium
   Scientists had worked for many years to devise a universal system for classifying the elements, but with limited success. Dimitri Ivanovich Mendeleev, or Mendeleyev (1834-1907), inaugurated a system called the Periodic Law of the Chemical Elements which arranged the elements in order of increasing atomic weight so that they could be arranged in tables of vertical columns. Not only were scientists now able to check disputed data about known elements, but this system showed a number of spaces into which no known element would fit. This indicated to Mendeleev that certain elements had not yet been discovered. The system was remarkable in that it was able to predict with great accuracy both the atomic weights and general properties of elements that were later discovered. Born in Siberia and educated at the University of St. P rsburg, Mendeleev became the director of weights and measures for the czar and introduced the metric system into his country. In 1955, four eminent American scientists—Glenn Seaborg, Bernard Harvey, Gregory Choppin, and S. G. Thompson—discovered an artificially produced radioactive element, 101, and named it mendelevium for Dimitri Mendeleev. Mendelevium is formed in the laboratory by bombarding the element einsteinium with alpha particles.

Dictionary of eponyms. . 2013.

Look at other dictionaries:

  • Mendelevium — Mendélévium Mendélévium Ferm …   Wikipédia en Français

  • Mendélévium — Fermium ← Mendélévium → Nobélium Tm …   Wikipédia en Français

  • mendélévium — [ mɛ̃delevjɔm ] n. m. • 1955; de Mendeleïev, chimiste russe ♦ Chim., phys. Élément atomique (Md; no at. 101; m. at. [de l isotope de plus longue période] 258) de la série des actinides, produit artificiellement par bombardement d einsteinium 256… …   Encyclopédie Universelle

  • mendelevium — men*de*le vi*um (m[e^]n*d[e^]*l[=e] v[=e]*[u^]/m), a. [From Dmitri Mendeleyev, discoverer of the periodic law.] (Chem.) an unstable radioactive element discovered in 1955 and produced artificially only in very small quantities; symbol Md (also… …   The Collaborative International Dictionary of English

  • mendelevium — Symbol: Md Atomic number: 101 Atomic weight: (256) Radioactive metallic transuranic element. Belongs to the actinoid series. Only known isotope, Md 256 has a half life of 1.3 hours. First identified by Glenn T. Seaborg, Albert Ghiorso and… …   Elements of periodic system

  • mendelevium — 1955, Modern Latin, in honor of Dmitri Ivanovich Mendeleev …   Etymology dictionary

  • mendelevium — ☆ mendelevium [men΄də lē′vē əm ] n. [ModL: so named in honor of MENDELEEV Dmitri Ivanovich by its discoverers, A. Ghiorso, B. G. Harvey, G. R. Choppin, S. G. Thompson, & G. T. Seaborg, U.S. physicists] a radioactive, metallic chemical element,… …   English World dictionary

  • Mendelevium — fermium ← mendelevium → nobelium Tm ↑ Md ↓ (Upu) …   Wikipedia

  • Mendelevium — Eigenschaften …   Deutsch Wikipedia

  • mendelevium — /men dl ee vee euhm/, n. Chem., Physics. a transuranic element. Symbol: Md, Mv; at. no.: 101. [1950 55; named after D. I. MENDELEEV; see IUM] * * * ▪ chemical element  (Md),    synthetic chemical element of the actinoid series of the periodic… …   Universalium

  • Mendelevium — mendelevis statusas T sritis fizika atitikmenys: angl. mendelevium vok. Mendelevium, n rus. менделевий, m pranc. mendélévium, m …   Fizikos terminų žodynas


We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.