Chemicool
At
85
(210)
Astatine
General
|
States
|
Energies
|
Oxidation & Electrons
|
Appearance & Characteristics
Reactions
|
Other Forms
|
Radius
|
Conductivity
|
Abundance
Encyclopedia Britannica articles
General
Name
Astatine
Symbol
At
atomic number
85
Atomic weight
(210)
Density @ 293 K
?
Atomic volume
?
Group
Halogen
discovered
1940
States
state (s, l, g)
s
melting point
575.2 K
boiling point
K
Heat of fusion
?
Heat of vaporization
?
Back to the top
Energies
1st ionization energy
890 kJ/mole
electronegativity
2.2
2nd ionization energy
kJ/mole
electron affinity
270 kJ/mole
3rd ionization energy
kJ/mole
Specific heat
?
heat atomization
92 kJ/mole atoms
Oxidation & Electrons
Shells
2,8,18,32,18,7
electron configuration
[Xe] 4f14 5d10 6s2 6p5
minimum oxidation number
-1
maximum oxidation number
7
min. common oxidation no.
-1
max. common oxidation no.
1
Back to the top
Appearance & Characteristics
structure
color
uses
toxicity
hardness
mohs
characteristics
Radioactive
Reactions
reaction with air
reaction with 6M HCl
reaction with 6M HCl
reaction with 15M HNO3
reaction with 6M NaOH
Back to the top
Other Forms
number of isotopes
0
hydride(s)
HAt
oxide(s)
chloride(s)
Radius
ionic radius (2- ion)
pm
ionic radius (1- ion)
pm
atomic radius
pm
ionic radius (1+ ion)
pm
ionic radius (2+ ion)
pm
ionic radius (3+ ion)
pm
Back to the top
Conductivity
thermal conductivity
J/m-sec-deg
electrical conductivity
1/mohm-cm
polarizability
6 A^3
Abundance
source
Synthetic(Th or U decay)
rel. abund. solar system
log
abundance earth's crust
log
cost, pure
$/100g
cost, bulk
$/100g
Back to the top
World Wide Web presentation of Chemicool Periodic Table is © Copyright 1996-99 by David D. Hsu. Some data were provided by and used with the permission of JCE Software and is owned and copyright by the Division of Chemical Education, Inc. Additional data were provided by Perkin-Elmer through Peter Lykos of IIT. The information may not be redistributed without the permission of
David Hsu
or
JCE Software
.