Dy - Dysprosium

The rare earth metal dysprosium was discovered by de Boisbaudrain in 1886. Dysprosium is a component of glass blowers spectacles.

Atomic number - 66 Density g/mL 8 .54

Atomic weight u 162 .5 Melting point K 1682

Bonding radius A 1 .59 Boiling point K 2835

Atomic radius A 2 .49 Heat of vaporization kJ/mol 230

Ionization Potential V 5 .94 Heat of fusion kJ/mol 11 .06

Electronegativity - 1 .22 Specific heat J/gK 0 .17

The oxide is weak base.
Crystal are hexagonal.

Electron config. : [Xe] 4f¹⁰ 6s²

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113

Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Atomic number	-	66		Density	g/mL	8	.54
Atomic weight	u	162	.5	Melting point	K	1682
Bonding radius	A	1	.59	Boiling point	K	2835
Atomic radius	A	2	.49	Heat of vaporization	kJ/mol	230
Ionization Potential	V	5	.94	Heat of fusion	kJ/mol	11	.06
Electronegativity	-	1	.22	Specific heat	J/gK	0	.17
The oxide is weak base.				Crystal are hexagonal.
Electron config. : [Xe] 4f¹⁰ 6s²