Seaborgium (symbol Sg, atomic number 106) is a synthetic superheavy element named after Glenn Seaborg. It is classified as a transition metal and sits in group 6, period 7 of the periodic table.
Overview
Seaborgium is the chemical element with atomic number 106 and the symbol Sg. With a standard atomic weight of [269], it is a transition metal. In the periodic table it occupies group 6 and period 7, and under standard conditions it is normally a solid. Seaborgium is a synthetic superheavy element named after Glenn Seaborg.
Atomic structure
An atom of Seaborgium has 106 protons in its nucleus and, when neutral, 106 electrons arranged in the configuration [Rn] 5f14 6d4 7s2. Seaborgium has no stable isotope; the value [269] refers to the mass number of its most stable or most commonly produced isotope.
Discovery and place in the table
Seaborgium was discovered in 1974 by Lawrence Berkeley National Laboratory. It follows Dubnium (Db) and precedes Bohrium (Bh) in order of atomic number.
| Atomic number | 106 |
|---|---|
| Symbol | Sg |
| Atomic mass | [269] |
| Category | Transition metal |
| Group | 6 |
| Period | 7 |
| Electron configuration | [Rn] 5f14 6d4 7s2 |
| Phase at STP | Solid |
| Discovered | 1974 (Lawrence Berkeley National Laboratory) |