Tellurium-124

Properties and data of the isotope ¹²⁴Te.

Contents

General data

Name of the isotope:Tellurium-124; Te-124Symbol:¹²⁴Te or 12452TeMass number A:124 (= number of nucleons)Atomic number Z:52 (= number of protons)Neutrons N:72Isotopic mass:123.90282(1) u (atomic weight of Tellurium-124)Nuclide mass:123.8742956 u (calculated nuclear mass without electrons)Mass excess:-90.52259 MeVMass defect:1.127955616 u (per nucleus)Nuclear binding energy:1050.68388857 MeV (per nucleus)
8.47325717 MeV (average binding energy per nucleon)Separation energy:S_N = 9.42448(9) MeV (first neutron)
S_P = 8.59022(12) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.7183(28) femtometer fmYear of discovery:1932

Parent Nuclides

Direct parent isotopes are: ¹²⁴I, ¹²⁴Sb.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Tellurium Isotopic mixture	127.60 u	100 %
Isotope ¹²⁰Te	119.90406(2) u	0.09(1) %	stable	0+
Isotope ¹²²Te	121.90304(1) u	2.55(12) %	stable	0+
Isotope ¹²³Te	122.90427(1) u	0.89(3) %	9.2 × 10¹⁶ a	1/2+
Isotope ¹²⁴Te	123.90282(1) u	4.74(14) %	stable	0+
Isotope ¹²⁵Te	124.9044312(15) u	7.07(15) %	stable	1/2+
Isotope ¹²⁶Te	125.90331(1) u	18.84(25) %	stable	0+
Isotope ¹²⁸Te	127.904461(6) u	31.74(8) %	7.7(4) × 10²⁴ a	0+
Isotope ¹³⁰Te	129.90622275(8) u	34.08(62) %	0.79 × 10²¹ a	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 72) and isobaric (same nucleon number A = 124) with Tellurium-124. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 72	Isobar A = 124
40	¹¹²Zr
41	¹¹³Nb
42	¹¹⁴Mo
43	¹¹⁵Tc
44	¹¹⁶Ru	¹²⁴Ru
45	¹¹⁷Rh	¹²⁴Rh
46	¹¹⁸Pd	¹²⁴Pd
47	¹¹⁹Ag	¹²⁴Ag
48	¹²⁰Cd	¹²⁴Cd
49	¹²¹In	¹²⁴In
50	¹²²Sn	¹²⁴Sn
51	¹²³Sb	¹²⁴Sb
52	¹²⁴Te	¹²⁴Te
53	¹²⁵I	¹²⁴I
54	¹²⁶Xe	¹²⁴Xe
55	¹²⁷Cs	¹²⁴Cs
56	¹²⁸Ba	¹²⁴Ba
57	¹²⁹La	¹²⁴La
58	¹³⁰Ce	¹²⁴Ce
59	¹³¹Pr	¹²⁴Pr
60	¹³²Nd	¹²⁴Nd
61	¹³³Pm
62	¹³⁴Sm
63	¹³⁵Eu
64	¹³⁶Gd
65	¹³⁷Tb
66	¹³⁸Dy