Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
87658-56-8
Mendeleev Number
111
Mass
Atomic Mass
294 Da
Periodic Position
X Position
17
Y Position
7
Period
7
Group
17
Classification
Block
p
Category
Unknown
Goldschmidt
Synthetic
Atomic Radius
Covalent (Pyykko)
165
Temperature
Melting/Freeze (USE)
723 °K
Boiling/Density (USE)
883 °K
Density
STP
7.17 kg/cm³
Heat
Adiabatic Index
N/A
Etymology
Language Of Origin
Cherokee language via English
Origin Of Word
From the US state of Tennessee
Meaning
Tennessee
Symbol Origin
place name
Etymological Description
It is named after the state of Tennesee, which takes its name from the Cherokee village of Tanasi, where important work was done on one of the steps in synthesizing the element. It is also known by the names eka-astatin and ununseptium (Uus), which is provisionally given by the International Union of Applied Fundamentals and Chemistry.
Discovery & Isolation
Observed/Predicted By
Y. Organizer vd. (Dubna'da newspaper ONAE)
Observed/Discovery Year
2009
Discovery Location
Isolated Sample By
Joint Institute for Nuclear Research
Production & Use
Sources
It is obtained by bombarding berkelium-249 with calcium-48.
Radioactivity
Half Life
50 milliseconds
Lifetime
72 milliseconds
Electron Affinity
Electron Affinity (kJ/mol)
165.9
Dipole Polarity
Accepted
76
Uncertainty
15
Electron & Quantum
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p5
Quantum Number
hat/a
Electron Configuration Semantic
*[Rn] 5f14 6d10 7s2 7p5
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
32
Shells-4
32
Shells-5
18
Shells-6
7
