Chemicool
Au
79
196.9665
Gold
General
|
States
|
Energies
|
Oxidation & Electrons
|
Appearance & Characteristics
Reactions
|
Other Forms
|
Radius
|
Conductivity
|
Abundance
Encyclopedia Britannica articles
General
Name
Gold
Symbol
Au
atomic number
79
Atomic weight
196.9665
Density @ 293 K
19.32 g/cm3
Atomic volume
10.2 cm3/mol
Group
Trans. Met.
discovered
0
States
state (s, l, g)
s
melting point
1337.63 K
boiling point
3081 K
Heat of fusion
12.550 kJ/mol
Heat of vaporization
334.40 kJ/mol
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Energies
1st ionization energy
890.1 kJ/mole
electronegativity
2.54
2nd ionization energy
1980 kJ/mole
electron affinity
222.752 kJ/mole
3rd ionization energy
kJ/mole
Specific heat
0.128 J/gK
heat atomization
366 kJ/mole atoms
Oxidation & Electrons
Shells
2,8,18,32,18,1
electron configuration
[Xe] 4f14 5d10 6s1
minimum oxidation number
-1
maximum oxidation number
5
min. common oxidation no.
0
max. common oxidation no.
3
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Appearance & Characteristics
structure
fcc: face-centered cubic
color
golden yellow
uses
jewelry, electronics
toxicity
hardness
2.75 mohs
characteristics
Inert, ductile malleable
Reactions
reaction with air
none
reaction with 6M HCl
none
reaction with 6M HCl
none
reaction with 15M HNO3
none
reaction with 6M NaOH
none
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Other Forms
number of isotopes
1
hydride(s)
none
oxide(s)
Au2O3
chloride(s)
AuCl AuCl3
Radius
ionic radius (2- ion)
pm
ionic radius (1- ion)
pm
atomic radius
144 pm
ionic radius (1+ ion)
151 pm
ionic radius (2+ ion)
pm
ionic radius (3+ ion)
99 pm
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Conductivity
thermal conductivity
318 J/m-sec-deg
electrical conductivity
446.4 1/mohm-cm
polarizability
6.1 A^3
Abundance
source
Gold, gold bearing rock (misc)
rel. abund. solar system
-0.728 log
abundance earth's crust
-2.4 log
cost, pure
4400 $/100g
cost, bulk
1200 $/100g
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