Ytterbium-168

Properties and data of the isotope ¹⁶⁸Yb.

Contents

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

General data

Name of the isotope:Ytterbium-168; Yb-168Symbol:¹⁶⁸Yb or 16870YbMass number A:168 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:98Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4 (= neutron-proton ratio)Neutron excess (N-Z):28Isotopic mass:167.93389(2) u (atomic weight of Ytterbium-168)Nuclide mass:167.8954929 u (calculated nuclear mass without electrons)Mass excess:-61.58107 MeVMass defect:1.463024008 u (per nucleus)Nuclear binding energy:1362.79808531 MeV (per nucleus)
8.11189336 MeV (average binding energy per nucleon)Separation energy:S_N = 9.063(4) MeV (first neutron)
S_P = 6.3272(15) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.2702(56) femtometer fmYear of discovery:1938

Parent Nuclides

Direct parent isotopes are: ¹⁶⁸Lu, ¹⁶⁸.

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 = 98) and isobaric (same nucleon number A = 168) with Ytterbium-168. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 98	Isobar A = 168
57	¹⁵⁵La
58	¹⁵⁶Ce
59	¹⁵⁷Pr
60	¹⁵⁸Nd
61	¹⁵⁹Pm
62	¹⁶⁰Sm
63	¹⁶¹Eu	¹⁶⁸Eu
64	¹⁶²Gd	¹⁶⁸Gd
65	¹⁶³Tb	¹⁶⁸Tb
66	¹⁶⁴Dy	¹⁶⁸Dy
67	¹⁶⁵Ho	¹⁶⁸Ho
68	¹⁶⁶Er	¹⁶⁸Er
69	¹⁶⁷Tm	¹⁶⁸Tm
70	¹⁶⁸Yb	¹⁶⁸Yb
71	¹⁶⁹Lu	¹⁶⁸Lu
72	¹⁷⁰Hf	¹⁶⁸Hf
73	¹⁷¹Ta	¹⁶⁸Ta
74	¹⁷²W	¹⁶⁸W
75	¹⁷³Re	¹⁶⁸Re
76	¹⁷⁴Os	¹⁶⁸Os
77	¹⁷⁵Ir	¹⁶⁸Ir
78	¹⁷⁶Pt	¹⁶⁸Pt
79	¹⁷⁷Au
80	¹⁷⁸Hg
81	¹⁷⁹Tl
82	¹⁸⁰Pb