Rhodium-104
Properties and data of the isotope 104Rh.
See also: List of individual Rhodium isotopes (and general data sources).
General data
Name of the isotope:Rhodium-104; Rh-104Symbol:104Rh or 10445RhMass number A:104 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:59Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3111111111111 (= neutron-proton ratio)Neutron excess (N-Z):14Isotopic mass:103.9066453(25) u (atomic weight of Rhodium-104)Nuclide mass:103.8819605 u (calculated nuclear mass without electrons)Mass excess:-86.95934 MeVMass defect:0.95671118400001 u (per nucleus)Nuclear binding energy:891.17072763 MeV (per nucleus)
8.5689493 MeV (average binding energy per nucleon)Separation energy:SN = 6.99896(8) MeV (first neutron)
SP = 6.9811(23) MeV (first proton)Half-life:42.3(4) sDecay constant λ:0.016386458169266 s-1Specific activity α:9.580733911726 × 10+19 Bq g-1
2589387543.7098 Ci g-1Spin and parity:
(nuclear angular momentum)1+Year of discovery:1939
Radioactive Decay
Half-life T½ = 42.3(4) s respectively 4.23 × 101 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 104Ru | 0.45(10) % | 1.136(3) MeV | |
| β- | 104Pd | 99.55(10) % | 2.4358(27) MeV | |
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
| Nuclear Isomer | Excitation Energy | Half-life | Spin |
|---|
| 104mRh | 128.9679(5) keV | 4.34(3) min | 5+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 104) with Rhodium-104. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 59 | Isobar A = 104 |
|---|
| 33 | 92As | |
| 34 | 93Se | |
| 35 | 94Br | |
| 36 | 95Kr | |
| 37 | 96Rb | |
| 38 | 97Sr | 104Sr |
| 39 | 98Y | 104Y |
| 40 | 99Zr | 104Zr |
| 41 | 100Nb | 104Nb |
| 42 | 101Mo | 104Mo |
| 43 | 102Tc | 104Tc |
| 44 | 103Ru | 104Ru |
| 45 | 104Rh | 104Rh |
| 46 | 105Pd | 104Pd |
| 47 | 106Ag | 104Ag |
| 48 | 107Cd | 104Cd |
| 49 | 108In | 104In |
| 50 | 109Sn | 104Sn |
| 51 | 110Sb | 104Sb |
| 52 | 111Te | |
| 53 | 112I | |
| 54 | 113Xe | |
| 55 | 114Cs | |
| 56 | 115Ba | |
| 57 | 116La | |
External data and identifiers
Last update: 2020-10-15
Perma link: https://www.chemlin.org/isotope/rhodium-104
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