SymbolYb
Latin nameYtterbium
Atomic number70
Period6
Element categoryInner transition elements
Relative atomic mass173.04
GroupIII.B
Electronegativity
1.1
Oxidation numbers
2, 3
Electron configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d0 6s2
Density [g/cm3]
6.97
State
Solid
Melting point [°C]
819
Boiling point [°C]
1194
Atomic radius [pm]
222
Thermal conductivity [W m-1K-1]
34.9
Heat capacity [J K-1g-1]
0.155
Discovery
1878
Vickers hardness [MPa]
206
Brinell hardness [MPa]
343
Young's modulus [GPa]
24
Electrical conductivity [S m-1]
3.6 · 106
Shear modulus [GPa]
9.9
1.st ionization energy [eV]
6.2542
2.nd ionization energy [eV]
12.188
3.rd ionization energy [eV]
25.03
Stable isotopes
7
Unstable isotopes
9