Dysprosium (Dy)

From Wikipedia, the free encyclopediaDysprosium is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in various minerals, such as xenotime.

Dysprosium in the periodic table

SymbolDy
Atomic number66
Group0
Period6
Blockf
Element categoryLanthanide

Physical properties

Phase at STPSolid
Density8.54 g/cm3
Atomic weight162.5 u
Melting point1680 K
1406.85 °C
2564.33 °F
Boiling point2840 K
2566.85 °C
4652.33 °F

Atomära egenskaper

Electronegativity (Pauling Scale)1.22
Electron affinity33.96 kJ/mol
Ionization energies
1573 kJ/mol
2 1130 kJ/mol
3 2200 kJ/mol
4 3990 kJ/mol

Electron configuration

Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f10 5s2 5p6 6s2
Electrons per shell2, 8, 18, 28, 8, 2

History

Discovered1886
Discovered byLecoq de Boisbaudran