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Which isotopes occur naturally in platinum?
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platinum group
Rhodium foil and wire.
Natural platinum occurs as a mixture of six isotopes. These isotopes and their approximate natural abundances are as follows:
- Platinum-190: 0.012 percent
- Platinum-192: 0.782 percent
- Platinum-194: 32.86 percent
- Platinum-195: 33.78 percent
- Platinum-196: 25.21 percent
- Platinum-198: 7.36 percent
Among these, platinum-190 is the only one that is not stable; it has been identified as a long-lived alpha emitter.1