Magnesium-24

Properties and data of the isotope ²⁴Mg.

Content

General data

Name of the isotope:Magnesium-24; Mg-24Symbol:²⁴Mg or 2412MgMass number A:24 (= number of nucleons)Atomic number Z:12 (= number of protons)Neutrons N:12Isotopic mass:23.98504170(9) u (atomic weight of Magnesium-24)Nuclide mass:23.9784588 u (calculated nuclear mass without electrons)Mass excess:-13.93357 MeVMass defect:0.212837676 u (per nucleus)Nuclear binding energy:198.25701817 MeV (per nucleus)
8.26070909 MeV (average binding energy per nucleon)Separation energy:S_N = 16.53137(16) MeV (first neutron)
S_P = 11.69269(1) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:3.0570(16) femtometer fmYear of discovery:1920

Parent Nuclides

Direct parent isotopes are: ²⁵Si, ²⁴Al, ²⁴Na, ²⁶P, ²⁸P.

Occurrence

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

	Atomic Mass m_a	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+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 12) and isobaric (same nucleon number A = 24) with Magnesium-24. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 12	Isobar A = 24
4	¹⁶Be
5	¹⁷B
6	¹⁸C
7	¹⁹N	²⁴N
8	²⁰O	²⁴O
9	²¹F	²⁴F
10	²²Ne	²⁴Ne
11	²³Na	²⁴Na
12	²⁴Mg	²⁴Mg
13	²⁵Al	²⁴Al
14	²⁶Si	²⁴Si
15	²⁷P	²⁴P
16	²⁸S
17	²⁹Cl
18	³⁰Ar