See also: List of individual Chromium isotopes (and general data sources).
General data
Name of the isotope:Chromium-49; Cr-49Symbol:49Cr or 4924CrMass number A:49 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:25Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.0416666666667 (= neutron-proton ratio)Neutron excess (N-Z):1Isotopic mass:48.9513330(24) u (atomic weight of Chromium-49)Nuclide mass:48.9381674 u (calculated nuclear mass without electrons)Mass excess:-45.33302 MeVMass defect:0.453090668 u (per nucleus)Nuclear binding energy:422.0512387 MeV (per nucleus) 8.61329059 MeV (average binding energy per nucleon)Separation energy:SN = 10.582(8) MeV (first neutron) SP = 8.1443(24) MeV (first proton)Half-life:42.3(1) minDecay constant λ:0.00027310763615443 s-1Specific activity α:3.359852585736 × 10+18 Bq g-1 90806826.641519 Ci g-1Spin and parity: (nuclear angular momentum)5/2-Isobaric spin: 1/2Magnetic dipole moment:μ(μN) = 0.476(3)Nuclear g-factor:gl = 0.1904Mirror nucleus:Manganese-49Year of discovery:1942
Radioactive Decay
Half-life T½ = 42.3(1) min (minutes) respectively 2.538 × 103 seconds s.
The following table shows the atomic nuclei that are isotonic (same neutron number N = 25) and isobaric (same nucleon number A = 49) with Chromium-49. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
