Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
54038-01-06
Mendeleev Number
66
Mass
Atomic Mass
278 Da
Periodic Position
X Position
9
Y Position
7
Period
7
Group
9
Classification
Block
d
Category
Unknown
Goldschmidt
Synthetic
Color
Jmol
#EB0026
Molcas Gv
#EB0026
Atomic Radius
Covalent (Triple Bound)
113
Covalent (Pyykko)
129
Covalent (Pyykko Double)
125
Covalent (Pyykko Triple)
113
Density
STP
37.4 kg/cm³
Heat
Adiabatic Index
N/A
Etymology
Description
It has a half-life of approximately five milliseconds. The discovery of this element showed that fusion techniques could indeed be used to make new heavy nuclei. It was found and obtained at the Center for Heavy Ion Research in Darmstadt, West Germany. It is named after Austrian physicist Lise Meitner.
Origin Of Word
From physicist Lise Meitner
Symbol Origin
surname, eponym
Etymological Description
This name was given in honor of Lisa Meitner, who played a role in the discovery of nuclear fission. It is also known by the names eka-iridium and unilenium (Une), which is temporarily given by the International Union of Applied Fundamentals and Chemistry.
Discovery & Isolation
Observed/Predicted By
G. Münzenberg, P. Armbruster et al. (at GSI in Darmstadt)
Observed/Discovery Year
1982
Discovery Location
Isolated Sample By
GSI Helmholtz Center for Heavy Ion Research
Production & Use
Sources
It is obtained by bombarding bismuth-209 with iron-18.
Uses
It has no significant commercial use.
Radioactivity
Half Life
30 minutes
Lifetime
43.3 minutes
Decay Mode
Alpha Six
Dipole Polarity
Accepted
34
Uncertainty
3
Electron & Quantum
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d7
Quantum Number
4F9/2
Electron Configuration Semantic
*[Rn] 5f14 6d7 7s2
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
32
Shells-4
32
Shells-5
15
Shells-6
2
