Stable isotope Ytterbium (Yb)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Yb-168 70 98 167.933895 0.13% 35.00-87.00% Oxide
Yb-170 70 100 169.934758 3.05% >70.00% Oxide
Yb-171 70 101 170.936323 14.30% 95.00-97.50% Oxide
Yb-172 70 102 171.936378 21.90% >98.00% Oxide
Yb-173 70 103 172.938207 16.12% >92.00% Oxide
Yb-174 70 104 173.938858 31.80% >99.00% Oxide
Yb-176 70 106 175.942569 12.70% >99.60% Oxide

Properties of Ytterbium

Name Ytterbium
Symbol Yb
Atomic number 70
Atomic weight 173.04
Standard state Solid at 298 ºK
CAS Registry ID 7440-64-4
Group in periodic table N/A
Group name Lanthanoid
Period in periodic table 6 (Lanthanoid)
Block in periodic table f-block
Color Silvery white
Classification Metallic
Melting point 824 °C
Boiling point 1194 °C
Vaporization point 1194 °C
Thermal conductivity 34.9 W/(m·K)
Electrical resistivity 25.0 µΩ·cm at 25 ºC
Electronegativity 1.1
Specific heat 0.3 kJ/kg K
Heat of vaporization 160 kJ·mol-1
Heat of fusion 7.7 kJ·mol-1
Density of liquid 6.21 g/cm3 at 824 °C
Density of solid 6.97 g/cm3
Electron configuration [Xe]4f146s2
Atomic radius 1.945 Å
Ionic radius Yb3+: 0.868 Å (coordination number 6) and 0.98 Å (coordination number 8)
Oxidation states +2, +3