Platinum

Symbol PtAtomic number 78
Atomic mass
195.09
Thermal conductivity
0.716
Atomic radius
1.83
Covalent radius
1.30
Density
21.37
Atomic volume
9.10
Melting point
2045
Oxidation states
2,4
Boiling point
4100
Stable isotopes
6
Heat of vapor.
510
Electronegativity
2.28
Heat of fusion
19.6
First ionization
9.0
Specific heat
0.13
Electrical conduct.
9.1
Electron configuration

General descriptionNuclear data
Index

Periodic Table

Chemistry concepts
 
HyperPhysicsR Nave
Go Back





Platinum

Platinum is a grayish-white precious metal. Platinum metal is rare in nature, but the nugget at right was found in the Urals of Russia. Platinum rivals gold in value and is used for jewelry. It is very ductile and can be welded at red heat. It is used in high temperature metal alloys. It has a very small amount of chemical activity and as a result is used for electical contacts under corrosive laboratory conditions.

Platinum has important applications as a catalyst for speeding many chemical reactions. Both in the form of platinum sponge and as a fine powder called platinum black it is used for a catalyst in commercial chemical applications. It is used in automobile catalytic converters.

Platinum wire is useful for making up standard electrodes for electrochemical cells, and is the substrate of choice for examining the flame colors produced by metal ions since it does not contribute a significant amount of color in the flame.

One of the most reproducible low temperature thermometers is the platinum resistance thermometer.

One platinum containing mineral is sperrylite, PtAs2.

Atomic dataNuclear data
Index

Periodic Table

Chemistry concepts

Reference
Pauling
 
HyperPhysicsR Nave
Go Back







Platinum Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2)
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
78
190
189.959916
176.9081
1509.9
0
0.0001
6.5x1011y
a
3.24
78
192
191.961019
178.7721
1525.0
0
0.0079
stable
...
...
78
193
192.962977
179.7055
1531.3
1/2
...
60y
EC
0.057
78
194
193.962655
180.6367
1539.6
0
0.329
stable
...
...
78
195
194.964765
181.5701
1545.7
1/2
0.338
stable
...
...
78
196
195.964927
182.5018
1553.7
0
0.253
stable
...
...
78
198
197.967869
184.3675
1567.1
0
0.072
stable
...
...
Atomic data
Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
HyperPhysicsR Nave
Go Back