Lead, 82 Pb Lead Pípè / ˈ l ɛ d / (LED ) Ìhànsójú gray Ìwúwo átọ̀mù A r, std (Pb) 207.2(1) Lead ní orí tábìlì àyè Nọ́mbà átọ̀mù (Z ) 82 Ẹgbẹ́ group 14 (carbon group) Àyè àyè 6 Àdìpọ̀ Àdìpọ̀-p Ẹ̀ka ẹ́límẹ́ntì Post-transition metalÌtò ẹ̀lẹ́ktrọ́nù [Xe ] 4f14 5d10 6s2 6p2 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 32, 18, 4 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ 600.61 K (327.46 °C, 621.43 °F) Ígbà ìhó 2022 K (1749 °C, 3180 °F) Kíki (near r.t. ) 11.34 g/cm3 when liquid (at m.p. ) 10.66 g/cm3 Heat of fusion 4.77 kJ/mol Heat of 179.5 kJ/mol Molar heat capacity 26.650 J/(mol·K) pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 978 1088 1229 1412 1660 2027
Atomic properties Oxidation states −4, −2, −1, +1, +2 , +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment Electronegativity Pauling scale: 2.33 Atomic radius empirical: 175 pm Covalent radius 146±5 pm Van der Waals radius 202 pm Color lines in a spectral range Spectral lines of lead Other properties Natural occurrence primordial Crystal structure (fcc) Thermal expansion 28.9 µm/(m·K) (at 25 °C) Thermal conductivity 35.3 W/(m·K) Electrical resistivity 208 n Ω·m (at 20 °C) Magnetic ordering diamagnetic Young's modulus 16 GPa Shear modulus 5.6 GPa Bulk modulus 46 GPa Poisson ratio 0.44 Mohs hardness 1.5 Brinell hardness 38.3 MPa CAS Number 7439-92-1 Main isotopes of lead Isotope Abundance Half-life (t 1/2 ) Decay mode Product 204 Pb 1.4% >1.4×1017 y Alpha 2.186 200 Hg 205 Pb syn 1.53×107 y Epsilon 0.051 205 Tl 206 Pb 24.1% 206 Pb is stable with 124 neutrons 207 Pb 22.1% 207 Pb is stable with 125 neutrons 208 Pb 52.4% 208 Pb is stable with 126 neutrons 210 Pb trace 22.3 y Alpha 3.792 206 Hg Beta 0.064 210 Bi
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