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- Krypton
- Oxidation States of Rutherfordium
- Md (Symbol of Mendelevium)
- 59 (Atomic Number of Praseodymium)
- Atomic Mass of Curium in lb
Rb
Rubidium
35 known isotopes (1 stable,
34 radioactive)
72Rb
Mass
71.958851 u
Abundance —
Half-life 103 nanoseconds
Spin/Parity —
Decay Mode(s) Unknown
73Rb
Mass
72.950605 u
Abundance —
Half-life 81 nanoseconds
Spin/Parity (3/2-)
Decay Mode(s) Unknown
74Rb
Mass
73.944266 u
Abundance —
Half-life 64.776 milliseconds
Spin/Parity 0+
Decay Mode(s) EC/β⁺ (100%)
75Rb
Mass
74.938573 u
Abundance —
Half-life 19.0 seconds
Spin/Parity 3/2(-)
Decay Mode(s) EC/β⁺ (100%)
76Rb
Mass
75.935073 u
Abundance —
Half-life 36.5 seconds
Spin/Parity 1(-)
Decay Mode(s) EC/β⁺ (100%), ECA (3.8e-7%)
77Rb
Mass
76.930402 u
Abundance —
Half-life 3.78 m
Spin/Parity 3/2-
Decay Mode(s) EC/β⁺ (100%)
78Rb
Mass
77.928142 u
Abundance —
Half-life 17.66 m
Spin/Parity 0(+)
Decay Mode(s) EC/β⁺ (100%)
79Rb
Mass
78.923990 u
Abundance —
Half-life 22.9 m
Spin/Parity 5/2+
Decay Mode(s) EC/β⁺ (100%)
80Rb
Mass
79.922516 u
Abundance —
Half-life 33.4 seconds
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (100%)
81Rb
Mass
80.918994 u
Abundance —
Half-life 4.572 h
Spin/Parity 3/2-
Decay Mode(s) EC/β⁺ (100%)
82Rb
Mass
81.918209 u
Abundance —
Half-life 1.2575 m
Spin/Parity 1+
Decay Mode(s) EC/β⁺ (100%)
83Rb
Mass
82.915114 u
Abundance —
Half-life 86.2 d
Spin/Parity 5/2-
Decay Mode(s) Electron capture (100%)
84Rb
Mass
83.914375 u
Abundance —
Half-life 32.82 d
Spin/Parity 2-
Decay Mode(s) EC/β⁺ (96.1%), β⁻ (3.9%)
85Rb Stable
Mass
84.911790 u
Abundance 72.1700%
Half-life Stable
Spin/Parity 5/2-
Decay Mode(s) —
86Rb
Mass
85.911167 u
Abundance —
Half-life 18.642 d
Spin/Parity 2-
Decay Mode(s) β⁻ (99.9948%), Electron capture (0.0052%)
87Rb
Mass
86.909181 u
Abundance 27.8300%
Half-life 4.97E+10 years
Spin/Parity 3/2-
Decay Mode(s) β⁻ (100%)
88Rb
Mass
87.911316 u
Abundance —
Half-life 17.773 m
Spin/Parity 2-
Decay Mode(s) β⁻ (100%)
89Rb
Mass
88.912278 u
Abundance —
Half-life 15.32 m
Spin/Parity 3/2-
Decay Mode(s) β⁻ (100%)
90Rb
Mass
89.914798 u
Abundance —
Half-life 158 seconds
Spin/Parity 0-
Decay Mode(s) β⁻ (100%)
91Rb
Mass
90.916537 u
Abundance —
Half-life 58.2 seconds
Spin/Parity 3/2(-)
Decay Mode(s) β⁻ (100%)
92Rb
Mass
91.919728 u
Abundance —
Half-life 4.48 seconds
Spin/Parity 0-
Decay Mode(s) β⁻ (100%), β⁻n (0.0107%)
93Rb
Mass
92.922039 u
Abundance —
Half-life 5.84 seconds
Spin/Parity 5/2-
Decay Mode(s) β⁻ (100%), β⁻n (1.39%)
94Rb
Mass
93.926395 u
Abundance —
Half-life 2.702 seconds
Spin/Parity 3(-)
Decay Mode(s) β⁻ (100%), β⁻n (10.5%)
95Rb
Mass
94.929264 u
Abundance —
Half-life 377.7 milliseconds
Spin/Parity 5/2-
Decay Mode(s) β⁻ (100%), β⁻n (8.7%)
96Rb
Mass
95.934133 u
Abundance —
Half-life 203 milliseconds
Spin/Parity 2(-)
Decay Mode(s) β⁻ (100%), β⁻n (13.3%)
97Rb
Mass
96.937177 u
Abundance —
Half-life 169.1 milliseconds
Spin/Parity 3/2+
Decay Mode(s) β⁻ (100%), β⁻n (25.5%)
98Rb
Mass
97.941632 u
Abundance —
Half-life 115 milliseconds
Spin/Parity 0(-)
Decay Mode(s) β⁻ (100%), β⁻n (14.3%), β⁻2n (0.054%)
99Rb
Mass
98.945119 u
Abundance —
Half-life 54 milliseconds
Spin/Parity (3/2+)
Decay Mode(s) β⁻ (100%), β⁻n (19.8%)
100Rb
Mass
99.950332 u
Abundance —
Half-life 52 milliseconds
Spin/Parity (4-)
Decay Mode(s) β⁻ (100%), β⁻n (5.6%), β⁻2n (0.15%)
101Rb
Mass
100.954302 u
Abundance —
Half-life 32 milliseconds
Spin/Parity (3/2+)
Decay Mode(s) β⁻ (100%), β⁻n (28%)
102Rb
Mass
101.960008 u
Abundance —
Half-life 37 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%), β⁻n (18%)
103Rb
Mass
102.964401 u
Abundance —
Half-life 23 milliseconds
Spin/Parity —
Decay Mode(s) β⁻ (100%)
104Rb
Mass
103.970531 u
Abundance —
Half-life Unknown
Spin/Parity —
Decay Mode(s) β⁻ (100%)
105Rb
Mass
— u
Abundance —
Half-life Unknown
Spin/Parity —
Decay Mode(s) β⁻ (100%)
106Rb
Mass
— 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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