Rb
Rubidium
Z 37 85.468 g/molAlkali Metal
| 85Rb | 48 | 84.9118 | -82,167.341 | 72.17% | Stable | 5/2- | --- | 1921 |
| 87Rb | 50 | 86.9092 | -84,597.802 | 27.83% | 49.7 Gy | 3/2- | β⁻→87Sr(100%) | 1921 |
| 71Rb | 34 | 70.9653 | -32,290.0 | --- | --- | (5/2-) | p→70Kr | --- |
| 71mRb | 34 | 70.9654 | -32,240.0 | --- | --- | (1/2-) | --- | --- |
| 71nRb | 34 | 70.9656 | -32,030.0 | --- | --- | (9/2+) | --- | --- |
| 72Rb | 35 | 71.9589 | -38,330.0 | --- | 103.0 ns | (1+) | p→71Kr | 2017 |
| 72mRb | 35 | 71.959 | -38,230.0 | --- | --- | (3-) | p→71Kr | --- |
| 73Rb | 36 | 72.9506 | -46,010.0 | --- | --- | (3/2-) | p→72Kr(100%) β⁺→73Kr | 1996 |
| 73mRb | 36 | 72.9511 | -45,580.0 | --- | --- | (9/2+) | --- | --- |
| 74Rb | 37 | 73.9443 | -51,916.0 | --- | 64.78 ms | 0+ | β⁺→74Kr(100%) β⁺p→73Br | 1977 |
| 75Rb | 38 | 74.9386 | -57,218.7 | --- | 19.0 s | 3/2- | β⁺→75Kr(100%) | 1975 |
| 76Rb | 39 | 75.9351 | -60,479.1 | --- | 36.5 s | 1- | β⁺→76Kr(~100%) β⁺α→72Se(3.8e-7%) | 1969 |
| 76mRb | 39 | 75.9354 | -60,162.2 | --- | 3.05 µs | (4+) | γ→76Rb(100%) | 1986 |
| 77Rb | 40 | 76.9304 | -64,830.5 | --- | 3.78 m | 3/2- | β⁺→77Kr(100%) | 1972 |
| 78Rb | 41 | 77.9281 | -66,935.0 | --- | 17.66 m | 0+ | β⁺→78Kr(100%) | 1968 |
| 78mRb | 41 | 77.9282 | -66,888.0 | --- | 910.0 ns | (1-) | γ→78Rb(100%) | 1996 |
| 78nRb | 41 | 77.9283 | -66,824.0 | --- | 5.74 m | 4- | β⁺→78Kr(91%) γ→78Rb(9%) | 1968 |
| 79Rb | 42 | 78.924 | -70,802.8 | --- | 22.9 m | 5/2+ | β⁺→79Kr(100%) | 1957 |
| 80Rb | 43 | 79.9225 | -72,175.5 | --- | 33.4 s | 1+ | β⁺→80Kr(100%) | 1961 |
| 80mRb | 43 | 79.923 | -71,681.6 | --- | 1.63 µs | (6+) | γ→80Rb(100%) | 1980 |
| 81Rb | 44 | 80.919 | -75,457.0 | --- | 4.57 h | 3/2- | β⁺→81Kr(100%) | 1949 |
| 81mRb | 44 | 80.9191 | -75,371.0 | --- | 30.5 m | 9/2+ | γ→81Rb(97.6%) β⁺→81Kr(2.4%) | 1956 |
| 82Rb | 45 | 81.9182 | -76,188.0 | --- | 1.26 m | 1+ | β⁺→82Kr(100%) | 1949 |
| 82mRb | 45 | 81.9183 | -76,118.8 | --- | 6.47 h | 5- | β⁺→82Kr(~100%) γ→82Rb(<0.33%) | 1957 |
| 83Rb | 46 | 82.9151 | -79,070.6 | --- | 86.2 d | 5/2- | EC→83Kr(100%) | 1950 |
| 83mRb | 46 | 82.9152 | -79,028.5 | --- | 7.8 ms | 9/2+ | γ→83Rb(100%) | 1968 |
| 84Rb | 47 | 83.9144 | -79,759.0 | --- | 32.82 d | 2- | β⁺→84Kr(96.1%) β⁻→84Sr(3.9%) | 1947 |
| 84mRb | 47 | 83.9149 | -79,295.4 | --- | 20.26 m | 6- | γ→84Rb(~100%) β⁺→84Kr(<0.001%) | 1940 |
| 85mRb | 48 | 84.9123 | -81,653.335 | --- | 1.02 µs | 9/2+ | γ→85Rb(100%) | 1964 |
| 86Rb | 49 | 85.9112 | -82,747.0 | --- | 18.65 d | 2- | β⁻→86Sr(~100%) EC→86Kr(0.005%) | 1941 |
| 86mRb | 49 | 85.9118 | -82,190.95 | --- | 1.02 m | 6- | γ→86Rb(~100%) β⁻→86Sr(<0.3%) | 1951 |
| 88Rb | 51 | 87.9113 | -82,609.0 | --- | 17.78 m | 2- | β⁻→88Sr(100%) | 1939 |
| 88mRb | 51 | 87.9128 | -81,235.2 | --- | 123.0 ns | (7+) | γ→88Rb(100%) | 2000 |
| 89Rb | 52 | 88.9123 | -81,712.0 | --- | 15.32 m | 3/2- | β⁻→89Sr(100%) | 1940 |
| 90Rb | 53 | 89.9148 | -79,366.0 | --- | 2.63 m | 0- | β⁻→90Sr(100%) | 1951 |
| 90mRb | 53 | 89.9149 | -79,259.0 | --- | 4.3 m | 3- | β⁻→90Sr(97.4%) γ→90Rb(2.5%) | 1967 |
| 91Rb | 54 | 90.9165 | -77,745.0 | --- | 58.2 s | 3/2- | β⁻→91Sr(100%) β⁻n→90Sr | 1951 |
| 92Rb | 55 | 91.9197 | -74,772.0 | --- | 4.48 s | 0- | β⁻→92Sr(99.989%) β⁻n→91Sr(0.011%) | 1960 |
| 93Rb | 56 | 92.922 | -72,620.0 | --- | 5.84 s | 5/2- | β⁻→93Sr(98.61%) β⁻n→92Sr(1.39%) | 1960 |
| 93mRb | 56 | 92.9268 | -68,197.0 | --- | 111.0 ns | (27/2-) | γ→93Rb(100%) | 2010 |
| 94Rb | 57 | 93.9264 | -68,562.8 | --- | 2.7 s | 3- | β⁻→94Sr(89.7%) β⁻n→93Sr(10.3%) | 1961 |
| 94mRb | 57 | 93.9265 | -68,458.6 | --- | 130.0 ns | (0-) | γ→94Rb(100%) | 2016 |
| 94nRb | 57 | 93.9286 | -66,487.9 | --- | 107.0 ns | (10-) | γ→94Rb(100%) | 2008 |
| 95Rb | 58 | 94.9293 | -65,890.0 | --- | 377.7 ms | 5/2- | β⁻→95Sr(91.3%) β⁻n→94Sr(8.7%) | 1967 |
| 95mRb | 58 | 94.9302 | -65,055.0 | --- | --- | (9/2+) | γ→95Rb(100%) | 2009 |
| 96Rb | 59 | 95.9341 | -61,354.0 | --- | 201.5 ms | 2- | β⁻→96Sr(86.3%) β⁻n→95Sr(13.7%) β⁻n→94Sr | 1967 |
| 96mRb | 59 | 95.9341 | -61,350.0 | --- | 200.0 ms | (1+) | β⁻→96Sr γ→96Rb β⁻n→95Sr β⁻n→94Sr | 1981 |
| 96nRb | 59 | 95.9354 | -60,219.0 | --- | 1.8 µs | (10-) | γ→96Rb(100%) | 1999 |
| 97Rb | 60 | 96.9372 | -58,519.1 | --- | 169.1 ms | 3/2+ | β⁻→97Sr(74.5%) β⁻n→96Sr(25.5%) β⁻n→95Sr | 1969 |
| 97mRb | 60 | 96.9373 | -58,442.5 | --- | 5.7 µs | (1/2-) | γ→97Rb(100%) | 2012 |
| 98Rb | 61 | 97.9416 | -54,369.0 | --- | 115.0 ms | (0-) | β⁻→98Sr(85.646%) β⁻n→97Sr(14.3%) β⁻n→96Sr(0.054%) | 1971 |
| 98mRb | 61 | 97.9417 | -54,296.0 | --- | 96.0 ms | (3+) | β⁻→98Sr(100%) β⁻n→97Sr β⁻n→96Sr | 1980 |
| 98nRb | 61 | 97.9418 | -54,191.0 | --- | 358.0 ns | (2-) | γ→98Rb(100%) | 2009 |
| 99Rb | 62 | 98.9451 | -51,121.0 | --- | 54.0 ms | (3/2+) | β⁻→99Sr(82.7%) β⁻n→98Sr(17.3%) β⁻n→97Sr | 1971 |
| 100Rb | 63 | 99.9503 | -46,266.0 | --- | 51.3 ms | (4-) | β⁻→100Sr(94.25%) β⁻n→99Sr(5.6%) β⁻n→98Sr(0.15%) | 1978 |
| 101Rb | 64 | 100.9543 | -42,567.0 | --- | 31.8 ms | (3/2+) | β⁻→101Sr(72%) β⁻n→100Sr(28%) β⁻n→99Sr | 1992 |
| 102Rb | 65 | 101.96 | -37,250.0 | --- | 37.0 ms | (4+) | β⁻n→101Sr(65%) β⁻→102Sr(35%) β⁻n→100Sr | 1995 |
| 103Rb | 66 | 102.9644 | -33,160.0 | --- | 26.0 ms | (3/2+) | β⁻→103Sr(100%) β⁻n→102Sr β⁻n→101Sr | 2010 |
| 104Rb | 67 | 103.9705 | -27,450.0 | --- | 35.0 ms | --- | β⁻→104Sr β⁻n→103Sr β⁻n→102Sr | 2018 |