Platinum-196

Main isotopes of platinum

Iso­tope Decay abun­dance half-life (t1/2) mode pro­duct 190Pt 0.012% 6.5×1011 y α 186Os 192Pt 0.782% stable 193Pt syn 50 y ε 193Ir 194Pt 32.864% stable 195Pt 33.775% stable 196Pt 25.211% stable 198Pt 7.356% stable
Standard atomic weight (Ar)	195.084(9)

Natural platinum (₇₈Pt) occurs in five stable isotopes (¹⁹²Pt, ¹⁹⁴Pt, ¹⁹⁵Pt, ¹⁹⁶Pt, ¹⁹⁸Pt) and one very long-lived (half-life 6.50×10¹¹ years) radioisotope (¹⁹⁰Pt). There are also 31 known artificial radioisotopes, the longest-lived of which is ¹⁹³Pt with a half-life of 50 years. All other isotopes have half-lives under a year, most under a day.

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