Bismuth, 83 Bi Bismuth Pípè / ˈ b ɪ z m ə θ / (BIZ -məth ) Ìhànsójú lustrous silver Ìwúwo átọ̀mù A r, std (Bi) 208.9804 0(1) Bismuth ní orí tábìlì àyè Nọ́mbà átọ̀mù (Z ) 83 Ẹgbẹ́ group 15 (pnictogens) Àyè àyè 6 Àdìpọ̀ Àdìpọ̀-p Ẹ̀ka ẹ́límẹ́ntì Post-transition metalÌtò ẹ̀lẹ́ktrọ́nù [Xe ] 4f14 5d10 6s2 6p3 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 32, 18, 5 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 544.7 K (271.5 °C, 520.7 °F) Ígbà ìhó 1837 K (1564 °C, 2847 °F) Kíki (near r.t. ) 9.78 g/cm3 when liquid (at m.p. ) 10.05 g/cm3 Heat of fusion 11.30 kJ/mol Heat of 151 kJ/mol Molar heat capacity 25.52 J/(mol·K) pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 941 1041 1165 1325 1538 1835
Atomic properties Oxidation states −3, −2, −1, +1, +2, +3 , +4, +5 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: 2.02 energies Atomic radius empirical: 156 pm Covalent radius 148±4 pm Van der Waals radius 207 pm Color lines in a spectral range Spectral lines of bismuth Other properties Natural occurrence primordial Crystal structure rhombohedral Speed of sound thin rod 1790 m/s (at 20 °C) Thermal expansion 13.4 µm/(m·K) (at 25 °C) Thermal conductivity 7.97 W/(m·K) Electrical resistivity 1.29 µ Ω·m (at 20 °C) Magnetic ordering diamagnetic Young's modulus 32 GPa Shear modulus 12 GPa Bulk modulus 31 GPa Poisson ratio 0.33 Mohs hardness 2.25 Brinell hardness 94.2 MPa CAS Number 7440-69-9 Main isotopes of bismuth Isotope Abundance Half-life (t 1/2 ) Decay mode Product 207 Bi syn 31.55 y ε, β+ 2.399 207 Pb 208 Bi syn 368,000 y ε, β+ 2.880 208 Pb 209 Bi 100% (19 ± 2) ×1018 y α 3.14 205 Tl 210m Bi syn 3.04 ×106 y IT 0.271 210 Bi
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