Chemicool
Es
99
(254)
Einsteinium
General
|
States
|
Energies
|
Oxidation & Electrons
|
Appearance & Characteristics
Reactions
|
Other Forms
|
Radius
|
Conductivity
|
Abundance
Encyclopedia Britannica articles
General
Name
Einsteinium
Symbol
Es
atomic number
99
Atomic weight
(254)
Density @ 293 K
?
Atomic volume
?
Group
Rare Earth, Actinides
discovered
1954
States
state (s, l, g)
melting point
1133.2 K
boiling point
K
Heat of fusion
?
Heat of vaporization
?
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Energies
1st ionization energy
619 kJ/mole
electronegativity
1.3
2nd ionization energy
kJ/mole
electron affinity
kJ/mole
3rd ionization energy
kJ/mole
Specific heat
?
heat atomization
kJ/mole atoms
Oxidation & Electrons
Shells
2,8,18,32,29,8,2
electron configuration
[Rn] 5f11 7s2
minimum oxidation number
0
maximum oxidation number
3
min. common oxidation no.
0
max. common oxidation no.
3
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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
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Other Forms
number of isotopes
0
hydride(s)
oxide(s)
Es2O3
chloride(s)
Radius
ionic radius (2- ion)
pm
ionic radius (1- ion)
pm
atomic radius
186 pm
ionic radius (1+ ion)
pm
ionic radius (2+ ion)
pm
ionic radius (3+ ion)
pm
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Conductivity
thermal conductivity
J/m-sec-deg
electrical conductivity
1/mohm-cm
polarizability
19.7 A^3
Abundance
source
Synthetic
rel. abund. solar system
log
abundance earth's crust
log
cost, pure
$/100g
cost, bulk
$/100g
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