Tin-118

Properties and data of the isotope ¹¹⁸Sn.

Contents

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

General data

Name of the isotope:Tin-118; Sn-118Symbol:¹¹⁸Sn or 11850SnMass number A:118 (= number of nucleons)Atomic number Z:50 (= number of protons)Neutrons N:68Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.36 (= neutron-proton ratio)Neutron excess (N-Z):18Isotopic mass:117.901607(3) u (atomic weight of Tin-118)Nuclide mass:117.8741796 u (calculated nuclear mass without electrons)Mass excess:-91.65249 MeVMass defect:1.078858888 u (per nucleus)Nuclear binding energy:1004.95058102 MeV (per nucleus)
8.51653035 MeV (average binding energy per nucleon)Separation energy:S_N = 9.32642(13) MeV (first neutron)
S_P = 9.999(5) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.6393(19) femtometer fmYear of discovery:1924

Parent Nuclides

Direct parent isotopes are: ¹¹⁸Sb, ¹¹⁸In.

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 = 68) and isobaric (same nucleon number A = 118) with Tin-118. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 68	Isobar A = 118
38	¹⁰⁶Sr
39	¹⁰⁷Y
40	¹⁰⁸Zr
41	¹⁰⁹Nb
42	¹¹⁰Mo	¹¹⁸Mo
43	¹¹¹Tc	¹¹⁸Tc
44	¹¹²Ru	¹¹⁸Ru
45	¹¹³Rh	¹¹⁸Rh
46	¹¹⁴Pd	¹¹⁸Pd
47	¹¹⁵Ag	¹¹⁸Ag
48	¹¹⁶Cd	¹¹⁸Cd
49	¹¹⁷In	¹¹⁸In
50	¹¹⁸Sn	¹¹⁸Sn
51	¹¹⁹Sb	¹¹⁸Sb
52	¹²⁰Te	¹¹⁸Te
53	¹²¹I	¹¹⁸I
54	¹²²Xe	¹¹⁸Xe
55	¹²³Cs	¹¹⁸Cs
56	¹²⁴Ba	¹¹⁸Ba
57	¹²⁵La	¹¹⁸La
58	¹²⁶Ce
59	¹²⁷Pr
60	¹²⁸Nd
61	¹²⁹Pm
62	¹³⁰Sm
63	¹³¹Eu