nobelium

nobelium
/noh bel"ee euhm, -bee"lee-/, n. Chem., Physics.
a transuranic element in the actinium series. Symbol: No; at. no.: 102.
[1955-60; < NL; after NOBEL Institute, where first discovered; see -IUM]

* * *

 (No),  
 synthetic chemical element of the actinoid series of the periodic table, atomic number 102. Not occurring in nature, nobelium (as the isotope nobelium-254) was discovered (April 1958) by Albert Ghiorso, T. Sikkeland, J.R. Walton, and Glenn T. Seaborg at the University of California, Berkeley, as a product of the bombardment of curium (atomic number 96) with carbon ions (atomic number 6) accelerated in a heavy-ion linear accelerator. An international team of scientists working at the Nobel Institute of Physics in Stockholm had claimed less than a year before that they had synthesized the same element, which they named nobelium (for Alfred Nobel); but experiments performed in the Soviet Union (at the I.V. Kurchatov Institute of Atomic Energy, Moscow, and at the Joint Institute for Nuclear Research in Dubna) and in the United States (University of California, Berkeley) failed to confirm the discovery. The Berkeley and Dubna teams have subsequently produced more than a half dozen isotopes of nobelium; nobelium-255 (three-minute half-life) is the stablest. Using traces of this isotope, radiochemists have shown nobelium to exist in aqueous solution in both the +2 and +3 oxidation states. The +2 state is very stable, an effect more pronounced than was anticipated in comparison with the homologous lanthanoid element ytterbium (atomic number 70).

atomic number
102
stablest isotope
255
oxidation states
+2, +3
electronic config.
[Rn]5f147s2

* * *


Universalium. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Nobelium — Nobélium Nobélium Mendélév …   Wikipédia en Français

  • Nobélium — Mendélévium ← Nobélium → Lawrencium Yb …   Wikipédia en Français

  • nobélium — [ nɔbeljɔm ] n. m. • 1957; de Nobel, chimiste suéd. ♦ Chim. Élément chimique transuranien (No; no at. 102). ● nobélium nom masculin (de A. Nobel, nom propre) Élément transuranien de numéro atomique 102 (symbole No), dont on a identifié une… …   Encyclopédie Universelle

  • nobelium — Symbol: No Atomic number: 102 Atomic weight: (254) Radioactive metallic transuranic element, belongs to the actinoids. Seven known isotopes exist, the most stable being No 254 with a half life of 255 seconds. First identified with certainty by… …   Elements of periodic system

  • nobelium — (n.) 1957, from NOBEL (Cf. Nobel) + ium …   Etymology dictionary

  • nobelium — [nō bel′ē əm] n. [ModL: so named (1957) after Nobel Institute in Stockholm, where discovered] a radioactive, metallic chemical element, one of the actinides, produced by the nuclear bombardment of curium: symbol, No; at. no., 102: see the… …   English World dictionary

  • Nobelium — mendelevium ← nobelium → lawrencium Yb ↑ No ↓ (Upb) …   Wikipedia

  • Nobelium — Eigenschaften …   Deutsch Wikipedia

  • Nobelium — nobelis statusas T sritis fizika atitikmenys: angl. nobelium vok. Nobelium, n rus. нобелий, m pranc. nobélium, m …   Fizikos terminų žodynas

  • nobelium — nobelis statusas T sritis fizika atitikmenys: angl. nobelium vok. Nobelium, n rus. нобелий, m pranc. nobélium, m …   Fizikos terminų žodynas

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”