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:SN = 9.063(4) MeV (first neutron) SP = 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
Comparison of the natural Ytterbium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
Atomic Mass ma
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.
