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Metal > AntimonySb - Antimony An semi-metal. The reaction between antimony and iodine may be demonstrated in CHM 130. This reaction is characterized by a sudden and contrasting color change, but the product is very toxic. Atomic number - 51 Density g/mL 6 .68 Atomic weight u 121 .75 Melting point K 904 Bonding radius A 1 .4 Boiling point K 1860 Atomic radius A 1 .53 Heat of vaporization kJ/mol 77 .14 Ionization Potential V 8 .641 Heat of fusion kJ/mol 19 .87 Electronegativity - 2 .05 Specific heat J/gK 0 .21 The oxide is mildly acidic. Crystal are rhombohedral. Electron config. : [Kr] 4d10 5s25p3
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