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[noh-bel-ee-uh m, -bee-lee-] /noʊˈbɛl i əm, -ˈbi li-/

noun, Chemistry, Physics.
a transuranic element in the actinium series. Symbol: No; atomic number: 102.
a transuranic element produced artificially from curium. Symbol: No; atomic no: 102; half-life of most stable isotope, 255No: 180 seconds (approx.); valency: 2 or 3

1957, from Nobel + -ium.

nobelium no·bel·i·um (nō-běl’ē-əm)
Symbol No
A radioactive synthetic element in the actinide series; its longest-lived isotope is No 259 with a half-life of 58 minutes. Atomic number 102.
Symbol No
A synthetic, radioactive metallic element in the actinide series that is produced by bombarding curium with carbon ions. Its longest-lived isotope is No 255 with a half-life of 3.1 minutes. Atomic number 102. See Periodic Table.


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