Mendeleev's Periodic Table > Rb - Rubidium
Rb - Rubidium
Rubidium was discovered spectroscopically in 1861 by Robert Bunsen and Kirchoff in Heidelberg, Germany. It is a soft, silvery-white metallic element of the alkali metals group (Group 1). It is one of the most electropositive and alkaline elements. It ignites spontaneously in air and reacts violently with water, setting fire to the liberated hydrogen. As so with all the other alkali metals, Rubidium forms amalgams with mercury. It alloys with gold, caesium, sodium, and potassium. It colours a flame yellowish-violet.
| - | 37 | Density | g/mL | 1 | .53 | |||
|---|---|---|---|---|---|---|---|---|
| u | 85 | .4678 | K | 312 | .64 | |||
| A | 2 | .16 | K | 961 | ||||
| A | 2 | .98 | kJ/mol | 72 | .216 | |||
| V | 4 | .177 | kJ/mol | 2 | .192 | |||
| - | 0 | .82 | J/gK | 0 | .363 | |||
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| MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass |
074 64.9 msec EC,10.400 MeV Kr-74 73.944497 |
075 19.0 sec EC,7.020 MeV Kr-75 74.938571 |
076 36.5 sec EC,8.500 MeV Kr-76 75.935075 |
077 3.78 min EC,5.344 MeV Kr-77 76.930406 |
|
|---|---|---|---|---|---|
| MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass |
078 17.66 min EC,7.224 MeV Kr-78 77.928143 |
079 22.9 min EC,3.649 MeV Kr-79 78.924000 |
080 33.4 sec EC,5.723 MeV Kr-80 79.922522 |
081 4.576 hr EC,2.237 MeV Kr-81 80.918994 |
|
| MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass |
082 1.273 min EC,4.400 MeV Kr-82 81.918207 |
083 86.2 da EC,4.000 MeV Kr-83 82.915113 |
084 32.77 da B-/EC,2.681 Sr-84/Kr-84 83.914387 |
085 72.165% Stable 84.911792 |
|
| MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass |
086 18.631 da B-/EC,1.775 Sr-86/Kr-86 85.911169 |
087 27.835% 4.75E10 yr B-,4.800 MeV Sr-87 86.909185 |
088 17.78 min B-,5.316 MeV Sr-88 87.911323 |
089 15.15 min B-,4.501 MeV Sr-89 88.912288 |
|
| MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass |
090 158 sec B-,6.590 MeV Sr-90 89.914813 |
091 58.4 sec B-,5.861 MeV Sr-91 90.916491 |
092 4.492 sec B-/B-n,8.105 Sr-92/Sr-91 91.919683 |
093 5.84 sec B-/B-n,7.462 Sr-93/Sr-92 92.922032 |
|
| MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass |
094 2.702 sec B-/B-n,10.307 Sr-94/Sr-93 93.926430 |
095 377.5 msec B-/B-n,9.279 Sr-95/Sr-94 94.929318 |
096 202.8 msec B-/B-n,11.756 Sr-96/Sr-95 95.934270 |
097 169.9 msec B-/B-n,10.420 Sr-97/Sr-96 96.937331 |
|
| MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass |
098 114 msec B-/B-2n/B-n,12.344 Sr-98/Sr-96/Sr-97 97.941738 |
099 50.3 msec B-/B-n,11.250 Sr-99/Sr-98 98.945324 |
100 51 msec B-/B-n,13.500 Sr-100/Sr-99 99.949865 |
101 32 msec B-/B-n,11.810 Sr-101/Sr-100 100.95319 |
|
| MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass |
102 37 msec B-/B-n,2.500 Sr-102/Sr-101 102.0 |
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