Radon-224

Properties and data of the isotope ²²⁴Rn.

Contents

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

General data

Name of the isotope:Radon-224; Rn-224Symbol:²²⁴Rn or 22486RnMass number A:224 (= number of nucleons)Atomic number Z:86 (= number of protons)Neutrons N:138Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.6046511627907 (= neutron-proton ratio)Neutron excess (N-Z):52Isotopic mass:224.024096(11) u (atomic weight of Radon-224)Nuclide mass:223.9769238 u (calculated nuclear mass without electrons)Mass excess:22.44528 MeVMass defect:1.84461516 u (per nucleus)Nuclear binding energy:1718.24795385 MeV (per nucleus)
7.67074979 MeV (average binding energy per nucleon)Separation energy:S_N = 6.016(13) MeV (first neutron)
S_P = 8.727(17) MeV (first proton)Half-life:107(3) minDecay constant λ:0.00010796685055451 s^-1Specific activity α:2.902640992156 × 10⁺¹⁷ Bq g^-1
7844975.6544762 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1964

Radioactive Decay

Half-life T_½ = 107(3) min (minutes) respectively 6.420 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	²²⁴Fr	100 %	0.696(15) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 138) and isobaric (same nucleon number A = 224) with Radon-224. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 138	Isobar A = 224
82	²²⁰Pb
83	²²¹Bi	²²⁴Bi
84	²²²Po	²²⁴Po
85	²²³At	²²⁴At
86	²²⁴Rn	²²⁴Rn
87	²²⁵Fr	²²⁴Fr
88	²²⁶Ra	²²⁴Ra
89	²²⁷Ac	²²⁴Ac
90	²²⁸Th	²²⁴Th
91	²²⁹Pa	²²⁴Pa
92	²³⁰U	²²⁴U
93	²³¹Np	²²⁴Np
94	²³²Pu
95	²³³Am
96	²³⁴Cm
97	²³⁵Bk