Comparison of Tellurium and Radium

Attribute	Radium ×	Tellurium ×
Atomic mass (u)	226.02541	127.6
Standard state	Solid	Solid
Oxidation states	+2	-2 +4 +6
Electron configuration	[Rn]7s²	[Kr]5s²4d¹⁰5p⁴
Atomic radius (van der waals) (pm)	283	206
Electronegativity (pauling scale)	0.9	2.1
Electron affinity (eV)	-	1.971
Ionization energy (eV)	5.279	9.01
Boiling point (K)	1413	1261
Melting point (K)	973	722.66
Density (g/cm³)	5	6.232
Atomic number	88	52
Group name	Alkaline earth metal	Metalloid
Symbol	Ra	Te
Discovered (year)	1898	1782