Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
54037-14-8
Mendeleev Number
58
Mass
Atomic Mass
270 Da
Periodic Position
X Position
7
Y Position
7
Period
7
Group
7
Classification
Block
d
Category
Transition Metal
Goldschmidt
Synthetic
Color
Jmol
#E00038
Molcas Gv
#E00038
Atomic Radius
Covalent (Triple Bound)
119
Covalent (Pyykko)
141
Covalent (Pyykko Double)
128
Covalent (Pyykko Triple)
119
Density
STP
37.1 kg/cm³
Heat
Adiabatic Index
N/A
Etymology
Description
It is a radioactive transition metal. It has a half-life of approximately 1/500 second. It was discovered in 1976 by the Joint Institute for Nuclear Research in Dubna (USSR). It was confirmed by West German physicists working at the Center for Heavy Ion Research in Darmstadt.
Origin Of Word
From physicist Niels Bohr
Symbol Origin
soybean, eponym: Niels Bohr
Etymological Description
It is named after Niels Bohr, who made significant contributions to the understanding of atomic structure and quantum mechanics. Unilseptium was used as its provisional systematic name.
Discovery & Isolation
Observed/Predicted By
G.Münzenberg et al. (at GSI in Darmstadt)
Observed/Discovery Year
1981
Discovery Location
Isolated Sample By
GSI Helmholtz Center for Heavy Ion Research
Production & Use
Sources
It is obtained by bombarding bismuth-204 with chromium-54.
Uses
It has no significant commercial use.
Radioactivity
Half Life
1.5 seconds
Lifetime
2.17 seconds
Decay Mode
Alpha Six
Dipole Polarity
Accepted
38
Uncertainty
4
Electron & Quantum
Oxidation States
7
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d5
Quantum Number
Tsakh/A
Electron Configuration Semantic
*[Rn] 5f14 6d5 7s2
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
32
Shells-4
32
Shells-5
13
Shells-6
2
