Comparison of Dysprosium and Americium

Attribute	Americium ×	Dysprosium ×
Standard state	Solid	Solid
Electron configuration	[Rn]7s²5f⁷	[Xe]6s²4f¹⁰
Atomic mass (u)	243.06138	162.5
Electronegativity (pauling scale)	1.3	1.22
Oxidation states	+3 +4 +5 +6	+3
Ionization energy (eV)	5.993	5.939
Atomic radius (van der waals) (pm)	244	229
Boiling point (K)	2284	2840
Melting point (K)	1449	1685
Density (g/cm³)	13.69	8.55
Atomic number	95	66
Group name	Actinide	Lanthanide
Discovered (year)	1944	1886
Symbol	Am	Dy