Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
54038-81-2
Mendeleev Number
54
Mass
Atomic Mass
269 Da
Periodic Position
X Position
6
Y Position
7
Period
7
Group
6
Classification
Block
d
Category
Transition Metal
Goldschmidt
Synthetic
Color
Jmol
#D90045
Molcas Gv
#D90045
Atomic Radius
Covalent (Triple Bound)
121
Covalent (Pyykko)
143
Covalent (Pyykko Double)
128
Covalent (Pyykko Triple)
121
Density
STP
35 kg/cm³
Heat
Adiabatic Index
N/A
Etymology
Description
It has a half-life of 0.9+/-0.2 seconds. It was discovered in June 1974 at the Joint Nuclear Research Institute in Dubna, USSR. Its existence was confirmed by Lawrence Berkeley and Livermore National Laboratory in September 1974.
Language Of Origin
Swedish via English
Origin Of Word
From scientist Glenn T. Seaborg
Meaning
Swedish surname. Literal meaning: "Fort Lake
Symbol Origin
place name
Etymological Description
This name is given in honor of Glenn T. Seaborg, who discovered the chemistry of transuranium elements, played a role in isolating and discovering ten elements, and developed and proposed the actinide series. Eka-tungsten and unihexium (Unh) are temporary names given by the International Union of Pure and Applied Chemistry.
Discovery & Isolation
Observed/Predicted By
A. Ghiorso et al. (Berkeley Radiation Laboratory)
Observed/Discovery Year
1974
Discovery Location
Isolated Sample By
Lawrence Berkeley National Laboratory
Production & Use
Sources
It is obtained by bombarding californium-249 with oxygen-18.
Uses
It has no significant commercial use.
Radioactivity
Half Life
1.94 seconds
Lifetime
2.78 seconds
Decay Mode
Alpha Six
Dipole Polarity
Accepted
40
Uncertainty
4
Electron & Quantum
Oxidation States
0,6
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d4
Quantum Number
5D0
Electron Configuration Semantic
*[Rn] 5f14 6d4 7s2
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
32
Shells-4
32
Shells-5
12
Shells-6
2
