Element Meitnerium
It is an extremely radioactive synthetic element (an element not found in nature, but can be created in a laboratory).
Meitnerium is a synthetic chemical element with the symbol Mt and atomic number 109.
In the periodic table, meitnerium is a d-block transactinide element.
It is a member of the 7th period and is placed in the group 9 elements, although no chemical experiments have yet been carried out to confirm that it behaves as the heavier homologue to iridium in group 9 as the seventh member of the 6d series of transition metals.
Meitnerium is calculated to have similar properties to its lighter homologues, cobalt, rhodium, and iridium.
Names and Identifiers
| Chemical Formula: | Mt |
| CAS: | 54038-01-6 |
| Molecular Weight: | 278.156 g/mol |
| EC Number : | n/a |
| MDL Number: | n/a |
| Color: | unknown (presumably metallic/ silvery white/ gray) |
| Other Names: | Meitnerio |
| PubChem CID: | 56951716 |
| IUPAC Name: | Meitnerium |
| Inchl: | InChI=1S/Mt |
| InChI Key: | VAJSJTKWMRUWBF-UHFFFAOYSA-N |
| Canonical SMILES: | [Mt] |
| ICSC Number: | n/a |
Physical & Chemical Properties
| Phase: | Solid |
| Density: | 37.4 g/cm³ |
| Boiling Point: | n/a |
| Melting Point: | n/a |
| Molecular Formula: | Mt |
| Flash Point: | n/a |
| Exact Mass: | 278 |
All meitnerium isotopes are extremely unstable and radioactive; in general, heavier isotopes are more stable than the lighter. The most stable known meitnerium isotope, 278Mt, is also the heaviest known
Radiosotope data
| Isotope | Mass/Da | Half-life | Mode of decay | Nuclear spin | Nuclear magnetic moment |
|---|---|---|---|---|---|
| 265Mt | 266.1366 | ||||
| 266Mt | 266.13764 (45) | 0.0034 s | α to 262Bh; SF | ||
| 267Mt | 267.1375 | ||||
| 268Mt | 268.1388 | 0.070 s | α to 264Bh | ||
| 269Mt | 269.1391 | ||||
| 270Mt | 270.1407 | ||||
| 271Mt | 271.1412 | ||||
| 275Mt | 275 | 0.0097 s | α to 271Bh | ||
| 276Mt | 276 | 0.72 s | α to 272Bh |