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Rh
Rhodium
40 known isotopes (1 stable,
39 radioactive)
89Rh
Mass
88.950992 u
Abundance —
Half-life 120 nanoseconds
Spin/Parity —
Decay Mode(s) Unknown
90Rh
Mass
89.944569 u
Abundance —
Half-life 29 milliseconds
Spin/Parity (0+)
Decay Mode(s) EC/β⁺ (100%), ECP (0.7%)
91Rh
Mass
90.937123 u
Abundance —
Half-life 1.47 seconds
Spin/Parity (9/2+)
Decay Mode(s) EC/β⁺ (100%), β⁺p (1.3%)
92Rh
Mass
91.932368 u
Abundance —
Half-life 4.66 seconds
Spin/Parity (GE6+)
Decay Mode(s) EC/β⁺ (100%), β⁺p (1.9%)
93Rh
Mass
92.925913 u
Abundance —
Half-life 12.2 seconds
Spin/Parity (9/2+)
Decay Mode(s) EC/β⁺ (100%)
94Rh
Mass
93.921730 u
Abundance —
Half-life 70.6 seconds
Spin/Parity (4+)
Decay Mode(s) EC/β⁺ (100%), ECP (1.8%)
95Rh
Mass
94.915898 u
Abundance —
Half-life 5.02 m
Spin/Parity 9/2+
Decay Mode(s) EC/β⁺ (100%)
96Rh
Mass
95.914452 u
Abundance —
Half-life 9.90 m
Spin/Parity 6+
Decay Mode(s) EC/β⁺ (100%)
97Rh
Mass
96.911328 u
Abundance —
Half-life 30.7 m
Spin/Parity 9/2+
Decay Mode(s) EC/β⁺ (100%)
98Rh
Mass
97.910708 u
Abundance —
Half-life 8.72 m
Spin/Parity (2)+
Decay Mode(s) EC/β⁺ (100%)
99Rh
Mass
98.908121 u
Abundance —
Half-life 16.1 d
Spin/Parity 1/2-
Decay Mode(s) EC/β⁺ (100%)
100Rh
Mass
99.908114 u
Abundance —
Half-life 20.5 h
Spin/Parity 1-
Decay Mode(s) EC/β⁺ (100%)
101Rh
Mass
100.906159 u
Abundance —
Half-life 3.3 years
Spin/Parity 1/2-
Decay Mode(s) Electron capture (100%)
102Rh
Mass
101.906834 u
Abundance —
Half-life 207.3 d
Spin/Parity (1- 2-)
Decay Mode(s) EC/β⁺ (78%), β⁻ (22%)
103Rh Stable
Mass
102.905494 u
Abundance 100.0000%
Half-life Stable
Spin/Parity 1/2-
Decay Mode(s) —
104Rh
Mass
103.906645 u
Abundance —
Half-life 42.3 seconds
Spin/Parity 1+
Decay Mode(s) β⁻ (99.55%), EC/β⁺ (0.45%)
105Rh
Mass
104.905688 u
Abundance —
Half-life 35.341 h
Spin/Parity 7/2+
Decay Mode(s) β⁻ (100%)
106Rh
Mass
105.907286 u
Abundance —
Half-life 30.07 seconds
Spin/Parity 1+
Decay Mode(s) β⁻ (100%)
107Rh
Mass
106.906748 u
Abundance —
Half-life 21.7 m
Spin/Parity 7/2+
Decay Mode(s) β⁻ (100%)
108Rh
Mass
107.908715 u
Abundance —
Half-life 16.8 seconds
Spin/Parity 1+
Decay Mode(s) β⁻ (100%)
109Rh
Mass
108.908750 u
Abundance —
Half-life 80.8 seconds
Spin/Parity 7/2+
Decay Mode(s) β⁻ (100%)
110Rh
Mass
109.911080 u
Abundance —
Half-life 3.35 seconds
Spin/Parity (1+)
Decay Mode(s) β⁻ (100%)
111Rh
Mass
110.911643 u
Abundance —
Half-life 11 seconds
Spin/Parity (7/2+)
Decay Mode(s) β⁻ (100%)
112Rh
Mass
111.914405 u
Abundance —
Half-life 3.6 seconds
Spin/Parity (1+)
Decay Mode(s) β⁻ (100%)
113Rh
Mass
112.915440 u
Abundance —
Half-life 2.80 seconds
Spin/Parity (7/2+)
Decay Mode(s) β⁻ (100%)
114Rh
Mass
113.918722 u
Abundance —
Half-life 1.85 seconds
Spin/Parity 1+
Decay Mode(s) β⁻ (100%)
115Rh
Mass
114.920312 u
Abundance —
Half-life 0.99 seconds
Spin/Parity (7/2+)
Decay Mode(s) β⁻ (100%)
116Rh
Mass
115.924062 u
Abundance —
Half-life 0.68 seconds
Spin/Parity 1+
Decay Mode(s) β⁻ (100%)
117Rh
Mass
116.926036 u
Abundance —
Half-life 0.44 seconds
Spin/Parity (7/2+)
Decay Mode(s) β⁻ (100%)
118Rh
Mass
117.930341 u
Abundance —
Half-life 286 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (2.1%)
119Rh
Mass
118.932557 u
Abundance —
Half-life 171 milliseconds
Spin/Parity (7/2+)
Decay Mode(s) β⁻ (100%), β⁻n (6.4%)
120Rh
Mass
119.937069 u
Abundance —
Half-life 132 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (5.4%)
121Rh
Mass
120.939613 u
Abundance —
Half-life 151 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
122Rh
Mass
121.944305 u
Abundance —
Half-life 300 nanoseconds
Spin/Parity —
Decay Mode(s) Unknown
123Rh
Mass
122.947192 u
Abundance —
Half-life 42.2 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (24.2%)
124Rh
Mass
123.952002 u
Abundance —
Half-life 30 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
125Rh
Mass
124.955094 u
Abundance —
Half-life 26.5 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
126Rh
Mass
125.960064 u
Abundance —
Half-life 19 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
127Rh
Mass
126.963789 u
Abundance —
Half-life 20 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
128Rh
Mass
127.970649 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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