Rhodium-118
Properties and data of the isotope 118Rh.
See also: List of individual Rhodium isotopes (and general data sources).
General data
Name of the isotope:Rhodium-118; Rh-118Symbol:118Rh or 11845RhMass number A:118 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:73Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.6222222222222 (= neutron-proton ratio)Neutron excess (N-Z):28Isotopic mass:117.930340(26) u (atomic weight of Rhodium-118)Nuclide mass:117.9056552 u (calculated nuclear mass without electrons)Mass excess:-64.88787 MeVMass defect:1.054325308 u (per nucleus)Nuclear binding energy:982.09769845 MeV (per nucleus)
8.32286185 MeV (average binding energy per nucleon)Separation energy:SN = 4.061(26) MeV (first neutron)
SP = 12.69(43) MeV (first proton)Half-life:266 msDecay constant λ:2.6058164682705 s-1Specific activity α:1.341247335646 × 10+22 Bq g-1
362499279904.54 Ci g-1Spin and parity:
(nuclear angular momentum)Year of discovery:1994
Radioactive Decay
Half-life T½ = 266 ms respectively 2.66 × 10-1 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 118Pd | 96.9(14) % | 10.501(24) MeV | |
| β-, n | 117Pd | 3.1(14) % | 3.466(25) MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 73) and isobaric (same nucleon number A = 118) with Rhodium-118. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 73 | Isobar A = 118 |
|---|
| 41 | 114Nb | |
| 42 | 115Mo | 118Mo |
| 43 | 116Tc | 118Tc |
| 44 | 117Ru | 118Ru |
| 45 | 118Rh | 118Rh |
| 46 | 119Pd | 118Pd |
| 47 | 120Ag | 118Ag |
| 48 | 121Cd | 118Cd |
| 49 | 122In | 118In |
| 50 | 123Sn | 118Sn |
| 51 | 124Sb | 118Sb |
| 52 | 125Te | 118Te |
| 53 | 126I | 118I |
| 54 | 127Xe | 118Xe |
| 55 | 128Cs | 118Cs |
| 56 | 129Ba | 118Ba |
| 57 | 130La | 118La |
| 58 | 131Ce | |
| 59 | 132Pr | |
| 60 | 133Nd | |
| 61 | 134Pm | |
| 62 | 135Sm | |
| 63 | 136Eu | |
| 64 | 137Gd | |
| 65 | 138Tb | |
| 66 | 139Dy | |
| 67 | 140Ho | |
External data and identifiers
Last update: 2020-10-15
Perma link: https://www.chemlin.org/isotope/rhodium-118
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