Ytterbium-172

Properties and data of the isotope ¹⁷²Yb.

Contents

General data

Name of the isotope:Ytterbium-172; Yb-172Symbol:¹⁷²Yb or 17270YbMass number A:172 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:102Isotopic mass:171.93639(2) u (atomic weight of Ytterbium-172)Nuclide mass:171.8979929 u (calculated nuclear mass without electrons)Mass excess:-59.25233 MeVMass defect:1.495183672 u (per nucleus)Nuclear binding energy:1392.75461937 MeV (per nucleus)
8.09741058 MeV (average binding energy per nucleon)Separation energy:S_N = 8.01995(2) MeV (first neutron)
S_P = 7.3341(10) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.2995(57) femtometer fmYear of discovery:1934

Parent Nuclides

Direct parent isotopes are: ¹⁷²Lu, ¹⁷²Tm.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Ytterbium Isotopic mixture	173.045 u	100 %
Isotope ¹⁶⁸Yb	167.93389(2) u	0.126(1) %	stable	0+
Isotope ¹⁷⁰Yb	169.93477(2) u	3.023(2) %	stable	0+
Isotope ¹⁷¹Yb	170.93633(2) u	14.216(7) %	stable	1/2-
Isotope ¹⁷²Yb	171.93639(2) u	21.754(10) %	stable	0+
Isotope ¹⁷³Yb	172.93822(2) u	16.098(9) %	stable	5/2-
Isotope ¹⁷⁴Yb	173.93887(2) u	31.896(26) %	stable	0+
Isotope ¹⁷⁶Yb	175.94258(2) u	12.887(30) %	stable	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 102) and isobaric (same nucleon number A = 172) with Ytterbium-172. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 102	Isobar A = 172
60	¹⁶²Nd
61	¹⁶³Pm
62	¹⁶⁴Sm
63	¹⁶⁵Eu
64	¹⁶⁶Gd
65	¹⁶⁷Tb	¹⁷²Tb
66	¹⁶⁸Dy	¹⁷²Dy
67	¹⁶⁹Ho	¹⁷²Ho
68	¹⁷⁰Er	¹⁷²Er
69	¹⁷¹Tm	¹⁷²Tm
70	¹⁷²Yb	¹⁷²Yb
71	¹⁷³Lu	¹⁷²Lu
72	¹⁷⁴Hf	¹⁷²Hf
73	¹⁷⁵Ta	¹⁷²Ta
74	¹⁷⁶W	¹⁷²W
75	¹⁷⁷Re	¹⁷²Re
76	¹⁷⁸Os	¹⁷²Os
77	¹⁷⁹Ir	¹⁷²Ir
78	¹⁸⁰Pt	¹⁷²Pt
79	¹⁸¹Au	¹⁷²Au
80	¹⁸²Hg	¹⁷²Hg
81	¹⁸³Tl
82	¹⁸⁴Pb
83	¹⁸⁵Bi
84	¹⁸⁶Po