Chromium vs Thallium

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PropertyCr ChromiumTl Thallium
Atomic number2481
SymbolCrTl
NameChromiumThallium
Categorytransition-metalpost-transition-metal
Standard Atomic Weight51.9961 u204.3835 u
Period46
Group613
Blocksp
Phase at STPsolidsolid
Electron configuration[Ar]3d54s1[Xe]6s24f145d106p1
Oxidation states[-4, -2, -1, 0, 1, 2, 3, 4, 5, 6][-5, -2, -1, 1, 2, 3]
Electronegativity (Pauling)1.661.62
Electron affinity0.675 eV0.377 eV
Density7150 kg/m³1.180000e+4 kg/m³
Melting point1906.85 °C303.85 °C
Boiling point2670.85 °C1472.85 °C
Discovery year17971861