Magnesium-25
Properties and data of the isotope 25Mg.
See also: list of Magnesium isotopes.
General data
Name of the isotope:Magnesium-25; Mg-25Symbol:25Mg or 2512MgMass number A:25 (= number of nucleons)Atomic number Z:12 (= number of protons)Neutrons N:13Isotopic mass:24.9858370(3) u (atomic weight of Magnesium-25)Nuclide mass:24.9792541 u (calculated nuclear mass without electrons)Mass excess:-13.19275 MeVMass defect:0.220707292 u (per nucleus)Nuclear binding energy:205.58751825 MeV (per nucleus)
8.22350073 MeV (average binding energy per nucleon)Separation energy:SN = 7.33053(5) MeV (first neutron)
SP = 12.06385(5) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)5/2+Magnetic dipole moment:μ(μN) = -0.85533(3)Charge radius:3.0284(22) femtometer fmMirror nucleus:Aluminium-25Year of discovery:1920
Parent Nuclides
Direct parent isotopes are: 25Al, 25Na.
Occurrence
Comparison of the natural Magnesium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
| Atomic Mass ma | Quantity | Half-life | Spin |
---|
Magnesium Isotopic mixture | 24.305 u | 100 % | | |
Isotope 24Mg | 23.98504170(9) u | 78.965 % [78.88 - 79.05 %] | stable | 0+ |
Isotope 25Mg | 24.9858370(3) u | 10.011 % [9.988 - 10.034 %] | stable | 5/2+ |
Isotope 26Mg | 25.9825930(2) u | 11.024 % [10.96 - 11.09 %] | stable | 0+ |
NMR data
Nuclear magnetic properties of the NMR active Nuclide 25Mg
Isotope:25Mg-NMRQuantity:10.011 % [9.988 - 10.034 %]Spin:5/2+Nuclearmagnetic moment
μ/μN:-0.85533(3)Gyromagnetic ratio γ:- 1.639 · 107 rad T-1 s-1Nuclear g-factor:gl = -0.342132Quadrupole moment Q:+ 0.1994(20) barn (100 fm2)Resonance frequency:v0 = 2.6083 at 1 TRelative Sensitivity:0.002698 (H0 = const.)
0.7147 (v0 = const.)
[related to 1H = 1.000]
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 13) and isobaric (same nucleon number A = 25) with Magnesium-25. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 13 | Isobar A = 25 |
5 | 18B | |
6 | 19C | |
7 | 20N | 25N |
8 | 21O | 25O |
9 | 22F | 25F |
10 | 23Ne | 25Ne |
11 | 24Na | 25Na |
12 | 25Mg | 25Mg |
13 | 26Al | 25Al |
14 | 27Si | 25Si |
15 | 28P | 25P |
16 | 29S | |
17 | 30Cl | |
18 | 31Ar | |
19 | 32K | |
External data and identifiers
Last update: 2023-10-04
Perma link: https://www.chemlin.org/isotope/magnesium-25
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