102
259.00
No
Nobelium
Identification
CAS Number: 10028-14-5
Discovery Year: 1957
Discoverer: Nobel Institute for Physics
Discovery Location: Sweden
Properties
Atomic Dimensions
Van der Waals Radius: 246 pm
Thermodynamics
Electronic Structure
Abundance & Geochemistry
Goldschmidt Class: synthetic
About
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 Albert Ghiorso and Glenn T. Seaborg in 1966. Unnilbium has been proposed as an alternative name.
Isotopes
No-255 255 ☢ 3.52 min
No-259 259 ☢ 58.0 min
