Comparison of Silicon and Terbium

Attribute	Silicon ×	Terbium ×
Atomic mass (u)	28.085	158.92535
Standard state	Solid	Solid
Oxidation states	-4 +2 +4	+3
Electron configuration	[Ne]3s²3p²	[Xe]6s²4f⁹
Atomic radius (van der waals) (pm)	210	221
Electronegativity (pauling scale)	1.9	-
Electron affinity (eV)	1.385	-
Ionization energy (eV)	8.152	5.864
Boiling point (K)	3538	3503
Melting point (K)	1687	1629
Density (g/cm³)	2.3296	8.23
Atomic number	14	65
Group name	Metalloid	Lanthanide
Symbol	Si	Tb
Discovered (year)	1854	1843