Bismuth

Symbol BiAtomic number 83
Atomic mass
208.980
 Thermal conductivity
0.77877
Atomic radius
1.63
 Covalent radius
1.46
Density
9.8
 Atomic volume
21.3
Melting point
544.52
 Oxidation states
3,5
Boiling point
1837
 Stable isotopes
1
Heat of vapor.
104.8
 Electronegativity
2.02
Heat of fusion
11.3
 First ionization
7.289
Specific heat
0.12
 Electrical conduct.
...
Electron configuration
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Bismuth

Bismuth is a brittle metal with a silvery color showing a reddish tinge. It expands slightly upon freezing. Its principal use is in making low melting point alloys.

Bismuth is found in elemental form or as the sulfide Bi2S3 (bismuthinite) or oxide Bi2O3. It also forms a sulfide with copper called emplectite, CuBiS2.

Bismuth is one of the few elements which can be found in nature in pure form. These samples of bismuth are displayed in the Smithsonian Museum of Natural History. The sample at left and in the closeup below is about 18x18 cm and is from Carmen mine, Huayna, Potosi, Bolivia. The sample directly above is about 5x4 cm and is from Schneeberg, Sachsen, Germany.

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Bismuth Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
83
207
206.978446
192.7583
1625.9
9/2
...
32.2y
EC
2.40
83
208
207.979717
193.6910
1632.8
5
...
0.368My
EC
2.88
83
209
208.980374
194.6231
1640.3
9/2
1.00
stable
...
...
83
210
209.984096
195.5581
1644.9
1
...
5.01d
b-
1.16
83
211
210.987255
196.4926
1650.0
9/2
...
2.14m
a
8.69
83
212
211.991255
197.4278
1654.4
1
...
1.009h
b-,a
2.25
83
214
213.998691
199.2977
1663.6
1
...
19.9m
EC
2.40
Atomic data
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