It's Elemental - Isotopes of the Element Platinum

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Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

Isotopes of the Element Platinum with a Known Natural Abundance

Mass Number	Natural Abundance	Half-life

190	0.014%	6.5×10⁺¹¹ years

192	0.782%	Stable

194	32.967%	Stable

195	33.832%	Stable

196	25.242%	Stable

198	7.163%	Stable

All Known Isotopes of the Element Platinum

Mass Number	Half-life	Decay Mode	Branching Percentage

166	300 microseconds	Alpha Decay	100.00

167	0.7 milliseconds	Alpha Decay	100.00

168	2.0 milliseconds	Alpha Decay	<= 100.00

169	5 milliseconds	Alpha Decay	<= 100.00

170	13.8 milliseconds	Alpha Decay	98.00

171	34 milliseconds	Alpha Decay	~ 98.00

		Electron Capture	2.00

172	0.096 seconds	Alpha Decay	94.00

		Electron Capture	6.00

173	376 milliseconds	Alpha Decay	83.00

		Electron Capture	No Data Available

174	0.889 seconds	Alpha Decay	76.00

		Electron Capture	24.00

175	2.4 seconds	Alpha Decay	56.00

		Electron Capture	No Data Available

176	6.33 seconds	Electron Capture	62.00

		Alpha Decay	38.00

177	11 seconds	Electron Capture	94.40

		Alpha Decay	5.60

178	21.1 seconds	Electron Capture	92.30

		Alpha Decay	7.70

179	21.2 seconds	Electron Capture	99.76

		Alpha Decay	0.24

180	52 seconds	Electron Capture	100.00

		Alpha Decay	~ 0.30

181	52.0 seconds	Electron Capture	100.00

		Alpha Decay	~ 0.08

182	3.0 minutes	Electron Capture	99.96

		Alpha Decay	0.04

183	6.5 minutes	Electron Capture	100.00

		Alpha Decay	~ 1.3E-3

183_m	43 seconds	Electron Capture	~ 100.00

		Alpha Decay	< 4.0E-4

		Isomeric Transition	No Data Available

184	17.3 minutes	Electron Capture	100.00

		Alpha Decay	~ 0.001

185	70.9 minutes	Electron Capture	100.00

		Alpha Decay	No Data Available

185_m	33.0 minutes	Electron Capture	> 98.00

		Isomeric Transition	< 2.00

		Alpha Decay	No Data Available

186	2.08 hours	Electron Capture	100.00

		Alpha Decay	~ 1.4E-4

187	2.35 hours	Electron Capture	100.00

188	10.2 days	Electron Capture	100.00

		Alpha Decay	2.6E-5

189	10.87 hours	Electron Capture	100.00

190	6.5×10⁺¹¹ years	Alpha Decay	100.00

191	2.802 days	Electron Capture	100.00

192	Stable	-	-

193	50 years	Electron Capture	100.00

193_m	4.33 days	Isomeric Transition	100.00

194	Stable	-	-

195	Stable	-	-

195_m	4.02 days	Isomeric Transition	100.00

196	Stable	-	-

197	19.8915 hours	Beta-minus Decay	100.00

197_m	95.41 minutes	Isomeric Transition	96.70

		Beta-minus Decay	3.30

198	Stable	-	-

199	30.80 minutes	Beta-minus Decay	100.00

199_m	13.6 seconds	Isomeric Transition	100.00

200	12.5 hours	Beta-minus Decay	100.00

201	2.5 minutes	Beta-minus Decay	100.00

202	44 hours	Beta-minus Decay	100.00