Element Nobelium
It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science.
A radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series
Nobelium is a synthetic chemical element with the symbol No and atomic number 102
In the periodic table, nobelium is located to the right of the actinide mendelevium, to the left of the actinide lawrencium, and below the lanthanide ytterbium.
Nobelium metal has not yet been prepared in bulk quantities, and bulk preparation is currently impossible.
Nevertheless, a number of predictions and some preliminary experimental results have been done regarding its properties.
Names and Identifiers
| Chemical Formula: | No |
| CAS: | 10028-14-5 |
| Molecular Weight: | 259.00000g/mol |
| EC Number : | n/a |
| MDL Number: | n/a |
| Color: | unknown (presumably metallic/ silvery white/ gray) |
| Other Names: | Nobelio |
| PubChem CID: | 24822 |
| IUPAC Name: | Nobelium |
| Inchl: | InChI=1S/No |
| InChI Key: | ORQBXQOJMQIAOY-UHFFFAOYSA-N |
| Canonical SMILES: | [No] |
| ICSC Number: | n/a |
Physical & Chemical Properties
| Phase: | Solid |
| Density: | 9.94 g/cm³ |
| Boiling Point: | 1100 K (827 °C, 1521 °F) |
| Melting Point: | n/a |
| Molecular Formula: | No |
| Flash Point: | n/a |
| Exact Mass: | 259.10100 |
Twelve isotopes of nobelium are known, with mass numbers 250–260 and 262; all are radioactive.
Additionally, nuclear isomers are known for mass numbers 251, 253, and 254
Radiosotope data
| Isotope | Mass/Da | Half-life | Mode of decay | Nuclear spin | Nuclear magnetic moment |
|---|---|---|---|---|---|
| 253No | 253.0907 | 1.7 m | α to 249Fm; EC to 253Md | 9/2 | |
| 254No | 254.0909 | 55 s | α to 250Fm; EC to 254Md; SF | 0 | |
| 255No | 255.0932 | 3.1 m | α to 251Fm; EC to 255Md | 1/2 | |
| 256No | 256.0943 | 2.9 s | α to 252Fm; AS | 0 | |
| 257No | 257.0968 | 25 s | α to 253Fm | 7/2 | |
| 258No | 258.0983 | 0.0012 s | α to 254Fm; SF | 0 | |
| 259No | 259.100931 (12) | 58 m | α to 255Fm; EC to 259Md; SF | 9/2 |