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Element 47 - Silver (Ag)
From Old English
seolfor
, for silver; symbol Ag from its Latin name
argentum
, or prehistoric; the best conductor of heat and electricity. Its salts are basic in photgraphy; when silver bromide is exposed to light, it undergoes a chemical change which the developer then makes visible.
Properties
Atomic Number
:
47
Atomic Weight
:
107.868
Electron Configuration
(at ground state):
1s
2
2s
2
2p
6
3s
2
3p
6
3d
10
4s
2
4p
6
4d
10
5s
1
Oxidation States
(Bold most stable):
+1
Boiling Point
(K):
2436
Melting Point (K):
1235.08
Density
(at 300K -- g/cm
3
):
10.50
Atomic Volume (at 300K -- cm
3
/mol)
10.30
Number of stable
isotopes
:
2
Mass Number
(Bold naturally occurring) --
Half-Life
--
Disintigration Type
:
108 -- 127 years -- orbital
electron capture
110 -- 252 days --
beta particle
(
electron
) emission
111 -- 7.45 days --
beta particle
(
electron
) emission
Covalent Radius (Å):
1.34
Atomic Radius (Å):
1.44
First
Ionization Potential
(V):
7.576
Electronegativity
(Pauling's):
1.93
Specific Heat
Capacity (at 300K -- J g
-1
K
-1
):
0.235
Heat of Vaporization (kJ/mol):
250.63
Heat of Fusion (kJ/mol):
11.30
Electrical Conductivity (at 293K for polycrystalline material -- 10
6
-1
cm
-1
):
62.9
Thermal Conductivity (at 300K -- W m
-1
K
-1
):
429
Crystal Structure:
Cubic, face centered
Acid
-
Base
Properties:
Amphoteric