Ytterbium (Yb)

From Wikipedia, the free encyclopediaYtterbium 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. However, like the other lanthanides, its most common oxidation state is +3, seen in its oxide, halides and other compounds.

Ytterbium in the periodic table

SymbolYb
Atomic number70
Group0
Period6
Blockf
Element categoryLanthanide

Physical properties

Phase at STPSolid
Density6.9 g/cm3
Atomic weight173.045 u
Melting point1097 K
823.85 °C
1514.93 °F
Boiling point1469 K
1195.85 °C
2184.53 °F

Atomära egenskaper

Electronegativity (Pauling Scale)1.1
Electron affinity-1.93 kJ/mol
Ionization energies
1603.4 kJ/mol
2 1174.8 kJ/mol
3 2417 kJ/mol
4 4203 kJ/mol

Electron configuration

Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 6s2
Electrons per shell2, 8, 18, 32, 8, 2

History

Discovered1878
Discovered byJean Charles Galissard de Marignac