Comparison of Silicon and Nickel

Attribute	Silicon ×	Nickel ×
Atomic mass (u)	28.085	58.693
Standard state	Solid	Solid
Oxidation states	-4 +2 +4	+2 +3
Electron configuration	[Ne]3s²3p²	[Ar]4s²3d⁸
Atomic radius (van der waals) (pm)	210	163
Electronegativity (pauling scale)	1.9	1.91
Electron affinity (eV)	1.385	1.156
Ionization energy (eV)	8.152	7.64
Boiling point (K)	3538	3186
Melting point (K)	1687	1728
Density (g/cm³)	2.3296	8.912
Atomic number	14	28
Group name	Metalloid	Transition metal
Discovered (year)	1854	1751
Symbol	Si	Ni