Discovered By: Paul-Emile Lecoq de Boisbaudran
Discovery year: 1886

The following table showing some properties of Dysprosium(Dy):

Table Example
Atomic weight 162.5
Atomic number 66
Group n/a
Period 6
Block f
Electrons 66
Protons 66
Neutrons 97
Oxidation states +3
Ionic charge Dy^3+


Table Example
Electrons per shell K2 L8 M18 N28 O8 P2
Electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^10
Atomic radius 228 pm
Covalent radius 192 pm
Boiling point 2567°C
Melting point 1412°C
Neel point 178 K
Phase Solid
Fusion heat 11.1 kJ.mol^-1
Thermal expansion 9.9*10^-6 K^-1


Table Example
Vaporization heat 280 kJ.mol^-1
Color Silver
Brinell hardness 500 MPa
Bulk modulus 41 GPa
Density 8551 kg.m^-3
Liquid density 8370 kg.m^-3
Mohs hardness 1.8
Molar volume 1.9*10^-5 m^3.mol^-1
Poisson ratio 0.25
Shear modulus 25 GPa


Table Example
Sopund speed 2710 m.s^-1
Vickers hardness 540 MPa
Young's modulus 61 GPa
Electrical conductivity 1.1*10^6 S.m^-1
Electrical type Conductor
Magnetic type Paramagnetic
Resistivity 9.1*140^-7 Ohm.m
Curie point 87 K
Electronegativity 1.22
Valence 3
Electron affinioty 50 kJ.mol^-1
First ionization energy 573 kJ.mol^-1
Radioactive No
Neutron cross section 950 barn