Ytterbium

Ytterbium is a chemical element with symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide series, which is the basis of the relative stability of its +2 oxidation state.

Atomic Weight:  455
Density:        757 g/cm3
Melting Point:  767564 °C
 Boiling Point: 43434 °C