Rubidium-100
Properties and data of the isotope 100Rb.
See also: List of individual Rubidium isotopes (and general data sources).
General data
Name of the isotope:Rubidium-100; Rb-100Symbol:100Rb or 10037RbMass number A:100 (= number of nucleons)Atomic number Z:37 (= number of protons)Neutrons N:63Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.7027027027027 (= neutron-proton ratio)Neutron excess (N-Z):26Isotopic mass:99.950352(21) u (atomic weight of Rubidium-100)Nuclide mass:99.9300553 u (calculated nuclear mass without electrons)Mass excess:-46.24681 MeVMass defect:0.88506389200001 u (per nucleus)Nuclear binding energy:824.43170501 MeV (per nucleus)
8.24431705 MeV (average binding energy per nucleon)Separation energy:SN = 3.197(20) MeV (first neutron)
SP = 14.78(40) MeV (first proton)Half-life:51(8) msDecay constant λ:13.59112118745 s-1Specific activity α:8.267439013666 × 10+22 Bq g-1
2234442976666.5 Ci g-1Spin and parity:
(nuclear angular momentum)(3+.4+)Year of discovery:1978
Radioactive Decay
Half-life T½ = 51(8) ms respectively 5.1 × 10-2 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 100Sr | 93.84 % | 13.574(21) MeV | |
| β-, n | 99Sr | 6(3) % | 8.203(20) MeV | |
| β-, 2n | 98Sr | 0.16(8) % | | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 63) and isobaric (same nucleon number A = 100) with Rubidium-100. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 63 | Isobar A = 100 |
|---|
| 35 | 98Br | |
| 36 | 99Kr | 100Kr |
| 37 | 100Rb | 100Rb |
| 38 | 101Sr | 100Sr |
| 39 | 102Y | 100Y |
| 40 | 103Zr | 100Zr |
| 41 | 104Nb | 100Nb |
| 42 | 105Mo | 100Mo |
| 43 | 106Tc | 100Tc |
| 44 | 107Ru | 100Ru |
| 45 | 108Rh | 100Rh |
| 46 | 109Pd | 100Pd |
| 47 | 110Ag | 100Ag |
| 48 | 111Cd | 100Cd |
| 49 | 112In | 100In |
| 50 | 113Sn | 100Sn |
| 51 | 114Sb | |
| 52 | 115Te | |
| 53 | 116I | |
| 54 | 117Xe | |
| 55 | 118Cs | |
| 56 | 119Ba | |
| 57 | 120La | |
| 58 | 121Ce | |
| 59 | 122Pr | |
External data and identifiers
Last update: 2020-10-14
Perma link: https://www.chemlin.org/isotope/rubidium-100
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