Seaborgium (Sg)
Isotopes of Seaborgium
| Isotope | Atomic Mass | Half-life | Mode of Decay | Nuclear Spin | Nuclear Magnetic Moment |
| Sg-258 | 258.1132 | 0.0029 seconds | α to Rf-254; SF | No data available | No data available |
| Sg-259 | 259.1147 | 0.90 seconds | α to Rf-255 | 1/2 | No data available |
| Sg-260 | 260.1144 | 0.0036 seconds | α to Rf-256 | 0 | No data available |
| Sg-261 | 261.1162 | 0.23 seconds | α to Rf-257; SF | No data available | No data available |
| Sg-262 | 262.1164 | 0.0008 seconds | No data available | No data available | No data available |
| Sg-263 | 263.11822 | 0.80 seconds | α to Rf-259 | No data available | No data available |
| Sg-264 | 264.1189 | 0.0037 seconds | No data available | 0 | No data available |
| Sg-265 | 265.1211 | 16.00 seconds | α to Rf-261 | No data available | No data available |
| Sg-266 | 266.1219 | 21.00 seconds | α to Rf-262; SF | No data available | No data available |
Seaborgium is a synthetic element (an element that can be created in a laboratory but is not found in nature) discovered in 1974 by Albert Ghiorso and others at the Lawrence Berkeley National Laboratory and the Livermore National Laboratory, California, USA. Seaborgium takes its name from Glenn T. Seaborg, American nuclear chemist and Nobel Prize winner.
Chemistry experiments with seaborgium have firmly placed it in group 6 as a heavier homologue to tungsten. In its aqueous chemistry, seaborgium has been shown to resemble molybdenum and tungsten.
Properties of Seaborgium
| Name | Seaborgium |
| Symbol | Sg |
| Atomic number | 106 |
| Atomic weight | [271] |
| Standard state | Presumably a solid at 298 °K |
| CAS Registry ID | 54038-81-2 |
| Group in periodic table | 6 |
| Group name | None |
| Period in periodic table | 7 |
| Block in periodic table | d-block |
| Color | Unknown, but probably metallic and silvery white or grey in appearance |
| Classification | Metallic |
| Melting point | No data available |
| Boiling point | No data available |
| Density of solid | 23.2 g/cm3 (predicted) |
| Electron configuration | [Rn]5f146d47s2 |
| Oxidation state | +6 |
