Table
| nuclide symbol |
historic name |
Z(p) | N(n) | isotopic mass (u) |
half-life | decay mode(s) |
daughter isotope(s) |
nuclear spin |
representative isotopic composition (mole fraction) |
range of natural variation (mole fraction) |
|---|---|---|---|---|---|---|---|---|---|---|
| excitation energy | ||||||||||
| 199Fr | 87 | 112 | 199.00726(4) | 16(7) ms | 1/2+# | |||||
| 200Fr | 87 | 113 | 200.00657(8) | 24(10) ms | α | 196At | 3+# | |||
| 200mFr | 60(110) keV | 650(210) ms | α | 196At | 10-# | |||||
| IT (rare) | 200Fr | |||||||||
| 201Fr | 87 | 114 | 201.00386(8) | 67(3) ms | α (99%) | 197At | (9/2-) | |||
| β+ (1%) | 201Rn | |||||||||
| 202Fr | 87 | 115 | 202.00337(5) | 290(30) ms | α (97%) | 198At | (3+) | |||
| β+ (3%) | 202Rn | |||||||||
| 202mFr | 330(90)# keV | 340(40) ms | α (97%) | 198At | (10-) | |||||
| β+ (3%) | 202Rn | |||||||||
| 203Fr | 87 | 116 | 203.000925(17) | 0.55(2) s | α (95%) | 199At | (9/2-)# | |||
| β+ (5%) | 203Rn | |||||||||
| 204Fr | 87 | 117 | 204.000653(26) | 1.7(3) s | α (96%) | 200At | (3+) | |||
| β+ (4%) | 204Rn | |||||||||
| 204m1Fr | 50(4) keV | 2.6(3) s | α (90%) | 200At | (7+) | |||||
| β+ (10%) | 204Rn | |||||||||
| 204m2Fr | 326(4) keV | 1.7(6) s | (10-) | |||||||
| 205Fr | 87 | 118 | 204.998594(8) | 3.80(3) s | α (99%) | 201At | (9/2-) | |||
| β+ (1%) | 205Rn | |||||||||
| 206Fr | 87 | 119 | 205.99867(3) | ~16 s | β+ (58%) | 206Rn | (2+,3+) | |||
| α (42%) | 202At | |||||||||
| 206m1Fr | 190(40) keV | 15.9(1) s | (7+) | |||||||
| 206m2Fr | 730(40) keV | 700(100) ms | (10-) | |||||||
| 207Fr | 87 | 120 | 206.99695(5) | 14.8(1) s | α (95%) | 203At | 9/2- | |||
| β+ (5%) | 207Rn | |||||||||
| 208Fr | 87 | 121 | 207.99714(5) | 59.1(3) s | α (90%) | 204At | 7+ | |||
| β+ (10%) | 208Rn | |||||||||
| 209Fr | 87 | 122 | 208.995954(16) | 50.0(3) s | α (89%) | 205At | 9/2- | |||
| β+ (11%) | 209Rn | |||||||||
| 210Fr | 87 | 123 | 209.996408(24) | 3.18(6) min | α (60%) | 206At | 6+ | |||
| β+ (40%) | 210Rn | |||||||||
| 211Fr | 87 | 124 | 210.995537(23) | 3.10(2) min | α (80%) | 207At | 9/2- | |||
| β+ (20%) | 211Rn | |||||||||
| 212Fr | 87 | 125 | 211.996202(28) | 20.0(6) min | β+ (57%) | 212Rn | 5+ | |||
| α (43%) | 208At | |||||||||
| 213Fr | 87 | 126 | 212.996189(8) | 34.6(3) s | α (99.45%) | 209At | 9/2- | |||
| β+ (.55%) | 213Rn | |||||||||
| 214Fr | 87 | 127 | 213.998971(9) | 5.0(2) ms | α | 210At | (1-) | |||
| 214m1Fr | 123(6) keV | 3.35(5) ms | α | 210At | (8-) | |||||
| 214m2Fr | 638(6) keV | 103(4) ns | (11+) | |||||||
| 214m3Fr | 6477+Y keV | 108(7) ns | (33+) | |||||||
| 215Fr | 87 | 128 | 215.000341(8) | 86(5) ns | α | 211At | 9/2- | |||
| 216Fr | 87 | 129 | 216.003198(15) | 0.70(2) µs | α | 212At | (1-) | |||
| β+ (2×10−7%) | 216Rn | |||||||||
| 217Fr | 87 | 130 | 217.004632(7) | 16.8(19) µs | α | 213At | 9/2- | |||
| 218Fr | 87 | 131 | 218.007578(5) | 1.0(6) ms | α | 214At | 1- | |||
| 218m1Fr | 86(4) keV | 22.0(5) ms | α | 214At | ||||||
| IT (rare) | 218Fr | |||||||||
| 218m2Fr | 200(150)# keV | high | ||||||||
| 219Fr | 87 | 132 | 219.009252(8) | 20(2) ms | α | 215At | 9/2- | |||
| 220Fr | 87 | 133 | 220.012327(4) | 27.4(3) s | α (99.65%) | 216At | 1+ | |||
| β- (.35%) | 220Ra | |||||||||
| 221Fr | 87 | 134 | 221.014255(5) | 4.9(2) min | α (99.9%) | 217At | 5/2- | Trace | ||
| β- (.1%) | 221Ra | |||||||||
| CD (8.79×−11%) | 207Tl 14C |
|||||||||
| 222Fr | 87 | 135 | 222.017552(23) | 14.2(3) min | β- | 222Ra | 2- | |||
| 223Fr | Actinium K | 87 | 136 | 223.0197359(26) | 22.00(7) min | β- (99.99%) | 223Ra | 3/2(-) | Trace | |
| α (.006%) | 219At | |||||||||
| 224Fr | 87 | 137 | 224.02325(5) | 3.33(10) min | β- | 224Ra | 1- | |||
| 225Fr | 87 | 138 | 225.02557(3) | 4.0(2) min | β- | 225Ra | 3/2- | |||
| 226Fr | 87 | 139 | 226.02939(11) | 49(1) s | β- | 226Ra | 1- | |||
| 227Fr | 87 | 140 | 227.03184(11) | 2.47(3) min | β- | 227Ra | 1/2+ | |||
| 228Fr | 87 | 141 | 228.03573(22)# | 38(1) s | β- | 228Ra | 2- | |||
| 229Fr | 87 | 142 | 229.03845(4) | 50.2(4) s | β- | 229Ra | (1/2+)# | |||
| 230Fr | 87 | 143 | 230.04251(48)# | 19.1(5) s | β- | 230Ra | ||||
| 231Fr | 87 | 144 | 231.04544(50)# | 17.6(6) s | β- | 231Ra | (1/2+)# | |||
| 232Fr | 87 | 145 | 232.04977(69)# | 5(1) s | β- | 232Ra | ||||
Read more about this topic: Isotopes Of Francium
Famous quotes containing the word table:
“A man who can dominate a London dinner table can dominate the world. The future belongs to the dandy. It is the exquisites who are going to rule.”
—Oscar Wilde (1854–1900)
“When you got to the table you couldn’t go right to eating, but you had to wait for the widow to tuck down her head and grumble a little over the victuals, though there warn’t really anything the matter with them. That is, nothing only everything was cooked by itself. In a barrel of odds and ends it is different; things get mixed up, and the juice kind of swaps around, and the things go better.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)
““A sigh for every so many breath,
And for every so many sigh a death.
That’s what I always tell my wife
Is the multiplication table of life.””
—Robert Frost (1874–1963)