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Metal > CadmiumCd - Cadmium This toxic metal was discovered by Fredrich Strohmeyer in 1817, who was heating zinc carbonate (formerly known as kadmia) to remove impurities. The crimson emission color of cadmium is identified the flame tests in CHM 152. The pictured bar is coated with CdO. Atomic number - 48 Density g/mL 8 .65 Atomic weight u 112 .41 Melting point K 594 .18 Bonding radius A 1 .48 Boiling point K 1040 Atomic radius A 1 .71 Heat of vaporization kJ/mol 99 .57 Ionization Potential V 8 .993 Heat of fusion kJ/mol 6 .192 Electronegativity - 1 .69 Specific heat J/gK 0 .23 The oxide is mildly basic. Crystal are hexagonal. Electron config. : [Kr] 4d10 5s2
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