Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
54386-24-2
Mendeleev Number
74
Mass
Atomic Mass
282 Da
Periodic Position
X Position
11
Y Position
7
Period
7
Group
11
Classification
Block
d
Category
Unknown
Goldschmidt
Synthetic
Atomic Radius
Covalent (Triple Bound)
118
Covalent (Pyykko)
121
Covalent (Pyykko Double)
116
Covalent (Pyykko Triple)
118
Density
STP
28.7 kg/cm³
Heat
Adiabatic Index
N/A
Etymology
Origin Of Word
From physicist Wilhelm Conrad Röntgen
Symbol Origin
surname, eponym
Etymological Description
This name was given in honor of Wilhem Contrad Röntgen, who discovered X-rays. It is also known by the names Eka-gold and ununyum, which were temporarily given by the International Union of Applied Fundamentals and Chemistry.
Discovery & Isolation
Observed/Predicted By
S. Hofmann et al. (at GSI in Darmstadt)
Observed/Discovery Year
1994
Discovery Location
Isolated Sample By
GSI Helmholtz Center for Heavy Ion Research
Production & Use
Sources
It is obtained by bombarding bismuth-209 with nickel-60.
Uses
It has no significant commercial use.
Radioactivity
Half Life
10 minutes
Lifetime
14.5 minutes
Decay Mode
Alpha Six
Electron Affinity
Electron Affinity (kJ/mol)
151
Dipole Polarity
Accepted
32
Uncertainty
6
Electron & Quantum
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d9
Quantum Number
2S1/2
Electron Configuration Semantic
*[Rn] 5f14 6d10 7s1
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
32
Shells-4
32
Shells-5
17
Shells-6
2
