Atomic Properties of No
- Atomic Number of No
- 102
- Atomic Mass of No
- 259.0000 u
- Electron Configuration
- [Rn] 5f14 7s2
- Electronegativity
- 1.30
- Block
- f-block
- Group
- —
- Period
- 7
Nobelium (No) is element 102 on the periodic table. Atomic mass of No: 259.0000 u. No is in period 7. Melting point of No: 1100.00 K.Density of No: 9.90 g/cm³.
Nobelium in everyday life and industry
No biological studies possible. Too few atoms and too short-lived. No biological role.
Discovered by Nobel Institute for Physics in Sweden, 1957
Name origin: Named in honor of Alfred Nobel, who invented dynamite and founded Nobel prize.
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.
Nobelium has 0 naturally occurring isotopes, plus 1 notable radioactive isotope.
| Isotope | Atomic Mass (u) | Abundance | Half-Life | Decay Mode |
|---|---|---|---|---|
| 259102No (No-259)Nobelium-259 isotope | 259.10103 | — | — | — |
Data source: NIH PubChem (aggregated from IUPAC, NIST)
It has no significant commercial applications.
Made by bombarding curium with carbon-13
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