Comparison of Chromium and Dysprosium

Attribute	Chromium ×	Dysprosium ×
Atomic mass (u)	51.996	162.5
Standard state	Solid	Solid
Oxidation states	+2 +3 +6	+3
Electron configuration	[Ar]3d⁵4s¹	[Xe]6s²4f¹⁰
Atomic radius (van der waals) (pm)	189	229
Electronegativity (pauling scale)	1.66	1.22
Electron affinity (eV)	0.666	-
Ionization energy (eV)	6.767	5.939
Boiling point (K)	2944	2840
Melting point (K)	2180	1685
Density (g/cm³)	7.15	8.55
Atomic number	24	66
Group name	Transition metal	Lanthanide
Symbol	Cr	Dy
Discovered (year)	1797	1886