Nobelium Facts - No Element

Nobelium Chemical and Physical Properties

Nobelium
Science Picture Co/Getty Images

Nobelium Basic Facts

Atomic Number: 102

Symbol: No

Atomic Weight: 259.1009

Discovery: 1957 (Sweden) by the Nobel Institute for Physics; April 1958 at Berkeley by A. Ghiorso, T. Sikkeland, J.R. Walton, and G.T. Seaborg

Electron Configuration: [Rn] 7s2 5f14

Word Origin: Named for Alfred Nobel, discoverer of dynamite and founder of the Nobel Prize.

Isotopes: Ten isotopes of nobelium are recognized. Nobelium-255 has a half-life of 3 minutes.

Nobelium-254 has a half-life of 55-s, Nobelium-252 has a half-life of 2.3-s, and Nobelium-257 has a half-life of 23-s.

Sources: Ghiorso and his colleagues used a double-recoil technique. A heavy-ion linear accelerator was used to bombard a thin target of curium (95% Cm-244 and 4.5% Cm-246) with C-12 ions to produce No-102. The reaction proceeded according to the 246Cm(12C, 4n) reaction.

Element Classification: Radioactive Rare Earth Element (Actinide Series)

Nobelium Physical Data

Melting Point (K): 1100

Appearance: Radioactive, synthetic metal.

Atomic Radius (pm): 285

Pauling Negativity Number: 1.3

First Ionizing Energy (kJ/mol): (640)

Oxidation States: 3, 2

References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Lange's Handbook of Chemistry (1952), CRC Handbook of Chemistry & Physics (18th Ed.)

Return to the Periodic Table

Format
mla apa chicago
Your Citation
Helmenstine, Anne Marie, Ph.D. "Nobelium Facts - No Element." ThoughtCo, Mar. 11, 2017, thoughtco.com/nobelium-facts-no-element-606569. Helmenstine, Anne Marie, Ph.D. (2017, March 11). Nobelium Facts - No Element. Retrieved from https://www.thoughtco.com/nobelium-facts-no-element-606569 Helmenstine, Anne Marie, Ph.D. "Nobelium Facts - No Element." ThoughtCo. https://www.thoughtco.com/nobelium-facts-no-element-606569 (accessed May 27, 2018).