Rhodium-90

Properties and data of the isotope ⁹⁰Rh.

Contents

See also: List of individual Rhodium isotopes (and general data sources).

General data

Name of the isotope:Rhodium-90; Rh-90Symbol:⁹⁰Rh or 9045RhMass number A:90 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:45Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1 (= neutron-proton ratio)Neutron excess (N-Z):0Isotopic mass:89.94450(32) u (atomic weight of Rhodium-90)Nuclide mass:89.9198152 u (calculated nuclear mass without electrons)Mass excess:-51.69792 MeVMass defect:0.79754765999999 u (per nucleus)Nuclear binding energy:742.91086 MeV (per nucleus)
8.25456511 MeV (average binding energy per nucleon)Separation energy:S_N = 13.91(47) MeV (first neutron)
S_P = 0.73(42) MeV (first proton)Half-life:150 nsDecay constant λ:4620981.203733 s^-1Specific activity α:3.126764013483 × 10⁺²⁸ Bq g^-1
8.450713549954 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1994

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 45) and isobaric (same nucleon number A = 90) with Rhodium-90. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 45	Isobar A = 90
23	⁶⁸V
25	⁷⁰Mn
26	⁷¹Fe
27	⁷²Co
28	⁷³Ni
29	⁷⁴Cu
30	⁷⁵Zn
31	⁷⁶Ga
32	⁷⁷Ge	⁹⁰Ge
33	⁷⁸As	⁹⁰As
34	⁷⁹Se	⁹⁰Se
35	⁸⁰Br	⁹⁰Br
36	⁸¹Kr	⁹⁰Kr
37	⁸²Rb	⁹⁰Rb
38	⁸³Sr	⁹⁰Sr
39	⁸⁴Y	⁹⁰Y
40	⁸⁵Zr	⁹⁰Zr
41	⁸⁶Nb	⁹⁰Nb
42	⁸⁷Mo	⁹⁰Mo
43	⁸⁸Tc	⁹⁰Tc
44	⁸⁹Ru	⁹⁰Ru
45	⁹⁰Rh	⁹⁰Rh
46	⁹¹Pd	⁹⁰Pd
47	⁹²Ag