Chromium-54

Properties and data of the isotope ⁵⁴Cr.

Contents

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

General data

Name of the isotope:Chromium-54; Cr-54Symbol:⁵⁴Cr or 5424CrMass number A:54 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:30Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.25 (= neutron-proton ratio)Neutron excess (N-Z):6Isotopic mass:53.938879(4) u (atomic weight of Chromium-54)Nuclide mass:53.9257134 u (calculated nuclear mass without electrons)Mass excess:-56.93384 MeVMass defect:0.508869248 u (per nucleus)Nuclear binding energy:474.0086513 MeV (per nucleus)
8.77793799 MeV (average binding energy per nucleon)Separation energy:S_N = 9.71908(12) MeV (first neutron)
S_P = 12.373(3) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:3.6885(74) femtometer fmMirror nucleus:Zinc-54Year of discovery:1930

Parent Nuclides

Direct parent isotopes are: ⁵⁴Mn, ⁵⁴V.

Occurrence

Comparison of the natural Chromium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Chromium Isotopic mixture	51.9961 u	100 %
Isotope ⁵⁰Cr	49.9460414(5) u	4.345(13) %	1.3 × 10¹⁸ a	0+
Isotope ⁵²Cr	51.940506(4) u	83.789(18) %	stable	0+
Isotope ⁵⁴Cr	53.938879(4) u	2.365(7) %	stable	0+
Isotope ⁵³Cr	52.94064630(12) u	9.501(17) %	stable	3/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 30) and isobaric (same nucleon number A = 54) with Chromium-54. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 30	Isobar A = 54
13	⁴³Al
14	⁴⁴Si
15	⁴⁵P
16	⁴⁶S
17	⁴⁷Cl
18	⁴⁸Ar	⁵⁴Ar
19	⁴⁹K	⁵⁴K
20	⁵⁰Ca	⁵⁴Ca
21	⁵¹Sc	⁵⁴Sc
22	⁵²Ti	⁵⁴Ti
23	⁵³V	⁵⁴V
24	⁵⁴Cr	⁵⁴Cr
25	⁵⁵Mn	⁵⁴Mn
26	⁵⁶Fe	⁵⁴Fe
27	⁵⁷Co	⁵⁴Co
28	⁵⁸Ni	⁵⁴Ni
29	⁵⁹Cu	⁵⁴Cu
30	⁶⁰Zn	⁵⁴Zn
31	⁶¹Ga
32	⁶²Ge
33	⁶³As
34	⁶⁴Se