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Ru
Ruthenium
41 known isotopes (7 stable,
34 radioactive)
85Ru
Mass
84.967117 u
Abundance —
Half-life 450 nanoseconds
Spin/Parity —
Decay Mode(s) Unknown
86Ru
Mass
85.957305 u
Abundance —
Half-life 438 nanoseconds
Spin/Parity 0+
Decay Mode(s) Unknown
87Ru
Mass
86.950907 u
Abundance —
Half-life Unknown
Spin/Parity —
Decay Mode(s) Unknown
88Ru
Mass
87.941664 u
Abundance —
Half-life 1.2 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
89Ru
Mass
88.937338 u
Abundance —
Half-life 1.32 seconds
Spin/Parity (9/2+)
Decay Mode(s) EC/β⁺ (100%), ECP (3.1%)
90Ru
Mass
89.930344 u
Abundance —
Half-life 11.7 seconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
91Ru
Mass
90.926742 u
Abundance —
Half-life 8.0 seconds
Spin/Parity (9/2+)
Decay Mode(s) EC/β⁺ (100%)
92Ru
Mass
91.920234 u
Abundance —
Half-life 3.65 m
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
93Ru
Mass
92.917104 u
Abundance —
Half-life 59.7 seconds
Spin/Parity (9/2)+
Decay Mode(s) EC/β⁺ (100%)
94Ru
Mass
93.911343 u
Abundance —
Half-life 51.8 m
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
95Ru
Mass
94.910404 u
Abundance —
Half-life 1.643 h
Spin/Parity 5/2+
Decay Mode(s) EC/β⁺ (100%)
96Ru Stable
Mass
95.907589 u
Abundance 5.5400%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
97Ru
Mass
96.907546 u
Abundance —
Half-life 2.83 d
Spin/Parity 5/2+
Decay Mode(s) EC/β⁺ (100%)
98Ru Stable
Mass
97.905287 u
Abundance 1.8700%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
99Ru Stable
Mass
98.905930 u
Abundance 12.7600%
Half-life Stable
Spin/Parity 5/2+
Decay Mode(s) —
100Ru Stable
Mass
99.904210 u
Abundance 12.6000%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
101Ru Stable
Mass
100.905573 u
Abundance 17.0600%
Half-life Stable
Spin/Parity 5/2+
Decay Mode(s) —
102Ru Stable
Mass
101.904340 u
Abundance 31.5500%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
103Ru
Mass
102.906315 u
Abundance —
Half-life 39.247 d
Spin/Parity 3/2+
Decay Mode(s) β⁻ (100%)
104Ru Stable
Mass
103.905425 u
Abundance 18.6200%
Half-life Stable
Spin/Parity 0+
Decay Mode(s) —
105Ru
Mass
104.907745 u
Abundance —
Half-life 4.439 h
Spin/Parity 3/2+
Decay Mode(s) β⁻ (100%)
106Ru
Mass
105.907328 u
Abundance —
Half-life 371.8 d
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
107Ru
Mass
106.909970 u
Abundance —
Half-life 3.75 m
Spin/Parity (5/2)+
Decay Mode(s) β⁻ (100%)
108Ru
Mass
107.910186 u
Abundance —
Half-life 4.55 m
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
109Ru
Mass
108.913324 u
Abundance —
Half-life 34.4 seconds
Spin/Parity (5/2+)
Decay Mode(s) β⁻ (100%)
110Ru
Mass
109.914039 u
Abundance —
Half-life 12.04 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
111Ru
Mass
110.917568 u
Abundance —
Half-life 2.12 seconds
Spin/Parity 5/2+
Decay Mode(s) β⁻ (100%)
112Ru
Mass
111.918807 u
Abundance —
Half-life 1.75 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
113Ru
Mass
112.922847 u
Abundance —
Half-life 0.80 seconds
Spin/Parity (1/2+)
Decay Mode(s) β⁻ (100%)
114Ru
Mass
113.924614 u
Abundance —
Half-life 0.54 seconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
115Ru
Mass
114.929033 u
Abundance —
Half-life 318 milliseconds
Spin/Parity (3/2+)
Decay Mode(s) β⁻ (100%)
116Ru
Mass
115.931219 u
Abundance —
Half-life 204 milliseconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
117Ru
Mass
116.936135 u
Abundance —
Half-life 151 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
118Ru
Mass
117.938808 u
Abundance —
Half-life 99 milliseconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%), β⁻n (4.6%)
119Ru
Mass
118.944090 u
Abundance —
Half-life 69.5 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
120Ru
Mass
119.946623 u
Abundance —
Half-life 45 milliseconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
121Ru
Mass
120.952098 u
Abundance —
Half-life 29 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
122Ru
Mass
121.955147 u
Abundance —
Half-life 25 milliseconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
123Ru
Mass
122.960762 u
Abundance —
Half-life 19 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
124Ru
Mass
123.963940 u
Abundance —
Half-life 15 milliseconds
Spin/Parity 0+
Decay Mode(s) β⁻ (100%)
125Ru
Mass
124.969544 u
Abundance —
Half-life Unknown
Spin/Parity —
Decay Mode(s) β⁻ (100%)
Decay mode abbreviations:
β⁻ = Beta minus decay, β⁺ = Beta plus decay, EC = Electron capture, α = Alpha decay
n = Neutron emission, p = Proton emission, SF = Spontaneous fission, IT = Isomeric transition
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