Tin-120

Properties and data of the isotope ¹²⁰Sn.

Content

General data

Name of the isotope:Tin-120; Sn-120Symbol:¹²⁰Sn or 12050SnMass number A:120 (= number of nucleons)Atomic number Z:50 (= number of protons)Neutrons N:70Isotopic mass:119.902202(6) u (atomic weight of Tin-120)Nuclide mass:119.8747746 u (calculated nuclear mass without electrons)Mass excess:-91.09825 MeVMass defect:1.09559372 u (per nucleus)Nuclear binding energy:1020.53897662 MeV (per nucleus)
8.50449147 MeV (average binding energy per nucleon)Separation energy:S_N = 9.1047(11) MeV (first neutron)
S_P = 10.688(7) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.6519(21) femtometer fmYear of discovery:1926

Parent Nuclides

Direct parent isotopes are: ¹²⁰Sb, ¹²⁰In.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Tin Isotopic mixture	118.710 u	100 %
Isotope ¹¹²Sn	111.904824(4) u	0.97(1) %	stable	0+
Isotope ¹¹⁴Sn	113.902783(6) u	0.66(1) %	stable	0+
Isotope ¹¹⁵Sn	114.9033447(1) u	0.34(1) %	stable	1/2+
Isotope ¹¹⁶Sn	115.901743(1) u	14.54(9) %	stable	0+
Isotope ¹¹⁷Sn	116.902954(3) u	7.68(7) %	stable	1/2+
Isotope ¹¹⁸Sn	117.901607(3) u	24.22(9) %	stable	0+
Isotope ¹¹⁹Sn	118.903311(5) u	8.59(4) %	stable	1/2+
Isotope ¹²⁰Sn	119.902202(6) u	32.58(9) %	stable	0+
Isotope ¹²²Sn	121.90344(2) u	4.63(3) %	stable	0+
Isotope ¹²⁴Sn	123.905277(7) u	5.79(5) %	stable	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 70) and isobaric (same nucleon number A = 120) with Tin-120. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 70	Isobar A = 120
39	¹⁰⁹Y
40	¹¹⁰Zr
41	¹¹¹Nb
42	¹¹²Mo
43	¹¹³Tc	¹²⁰Tc
44	¹¹⁴Ru	¹²⁰Ru
45	¹¹⁵Rh	¹²⁰Rh
46	¹¹⁶Pd	¹²⁰Pd
47	¹¹⁷Ag	¹²⁰Ag
48	¹¹⁸Cd	¹²⁰Cd
49	¹¹⁹In	¹²⁰In
50	¹²⁰Sn	¹²⁰Sn
51	¹²¹Sb	¹²⁰Sb
52	¹²²Te	¹²⁰Te
53	¹²³I	¹²⁰I
54	¹²⁴Xe	¹²⁰Xe
55	¹²⁵Cs	¹²⁰Cs
56	¹²⁶Ba	¹²⁰Ba
57	¹²⁷La	¹²⁰La
58	¹²⁸Ce	¹²⁰Ce
59	¹²⁹Pr
60	¹³⁰Nd
61	¹³¹Pm
62	¹³²Sm
63	¹³³Eu
64	¹³⁴Gd
65	¹³⁵Tb