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Properties of substance:
palladium
Group of substances:
inorganic
Physical appearance:
cubic metal
Empirical formula (Hill's system for organic substances):
Pd
Structural formula as text:
Pd
Molar/atomic mass: 106.4
Melting point (°C):
1554
Boiling point (°C):
2040
Solubility (g/100 g of solvent):
gallium
: 33.4 (500°C) [
Ref.
]
mercury
: 0.006 (20°C) [
Ref.
]
water
: insoluble [
Ref.
]
Numerical data:
Year of discovery: 1803
Density:
12.02 (20°C, g/cm
3
)
Reactions:
[
Ref.1
]
Pd + F
2
→ PdF
2
[
Ref.1
,
Ref.2
]
Pd + Cl
2
→ PdCl
2
Half-life:
100
46
Pd = 3.63 d (electron capture (100%))
101
46
Pd = 8.47 h (β
+
(100%))
102
46
Pd = stable ( (isotopic abundance 1,02%))
103
46
Pd = 16.991 d (electron capture (100%))
104
46
Pd = stable ( (isotopic abundance 11,14%))
105
46
Pd = stable ( (isotopic abundance 22,33%))
105m
46
Pd = 36.1 μs (internal transition (100%))
106
46
Pd = stable ( (isotopic abundance 27,33%))
107
46
Pd = 6 500 000 y (β
-
(100%))
107m
46
Pd = 850 ns (internal transition (100%))
107n
46
Pd = 21.3 s (internal transition (100%))
108
46
Pd = stable ( (isotopic abundance 26,46%))
109
46
Pd = 13.7012 h (β
-
(100%))
109m
46
Pd = 380 ns (internal transition (100%))
109n
46
Pd = 4.696 min (internal transition (100%))
110
46
Pd = stable ( (isotopic abundance 11,72%))
111
46
Pd = 23.4 min (β
-
(100%))
111m
46
Pd = 5.5 h (internal transition (73%), β
-
(27%))
112
46
Pd = 21.04 h (β
-
(100%))
113
46
Pd = 93 s (β
-
(100%))
113m
46
Pd = 300 ms (internal transition (100%))
114
46
Pd = 2.42 min (β
-
(100%))
115
46
Pd = 25 s (β
-
(100%))
115m
46
Pd = 50 s (β
-
(92%), internal transition (8.0%))
116
46
Pd = 11.8 s (β
-
(100%))
117
46
Pd = 4.3 s (β
-
(100%))
117m
46
Pd = 19.1 ms (internal transition (100%))
118
46
Pd = 1.9 s (β
-
(100%))
119
46
Pd = 920 ms (β
-
(100%))
120
46
Pd = 492 ms (β
-
(100%), β
-
n)
121
46
Pd = 290 ms (β
-
(100%), β
-
n)
121m
46
Pd = 460 ns (internal transition (100%))
122
46
Pd = 195 ms (β
-
(100%), β
-
n)
123
46
Pd = 108 ms (β
-
(100%), β
-
n)
124
46
Pd = 88 ms (β
-
(100%), β
-
n)
125
46
Pd = 57 ms (β
-
(100%), β
-
n)
126
46
Pd = 48.6 (β
-
(100%), β
-
n)
127
46
Pd = 38 ms (β
-
(100%), β
-
n)
128
46
Pd = 35 ms (β
-
(100%), β
-
n)
128m
46
Pd = 5.8 μs (internal transition (100%))
129
46
Pd = 31 ms (β
-
(100%), β
-
n)
92
46
Pd = 1.1 s (β
+
(100%))
93
46
Pd = 1.15 s (β
+
(100%), β
+
p (7.5%))
94
46
Pd = 9.0 s (β
+
(100%))
94m
46
Pd = 511.0 ns (internal transition (100%))
94n
46
Pd = 197 ns (internal transition (100%))
95
46
Pd = 7.5 s (β
+
(100%))
95m
46
Pd = 13.3 s (internal transition (11%), β
+
p (0.93%))
96
46
Pd = 122 s (β
+
(100%))
96m
46
Pd = 1.81 μs (internal transition (100%))
97
46
Pd = 3.10 min (β
+
(100%))
98
46
Pd = 17.7 min (β
+
(100%))
99
46
Pd = 21.4 min (β
+
(100%))
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
0 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
0 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
37.7 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
25.9 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
17
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
353
References:
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 90 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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