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Lead (/lɛd/ ⓘ) is a chemical element with the symbol Pb (from the Latin plumbum) and atomic number 82. It is a heavy metal, denser than most common materials. Lead is soft, malleable, and has a relatively low melting point. When freshly cut or melted, it appears shiny silvery with a bluish tint, but tarnishes to dull gray on exposure to air. Lead has the…
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used high compounds exposure may use ii stable production metal density levels oxidation states atomic isotopes metals copper two number
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Lead | 202Pb | synth | 1.00 | infobox |
| Lead | 204Pb | 1.40% | 1.00 | infobox |
| Lead | 205Pb | synth | 1.00 | infobox |
| Lead | 206Pb | 24.1% | 1.00 | infobox |
| Lead | 207Pb | 22.1% | 1.00 | infobox |
| Lead | 208Pb | 52.4% | 1.00 | infobox |
| Lead | 209Pb | trace | 1.00 | infobox |
| Lead | 210Pb | trace | 1.00 | infobox |
| Lead | 211Pb | trace | 1.00 | infobox |
| Lead | 212Pb | trace | 1.00 | infobox |
| Lead | 214Pb | trace | 1.00 | infobox |
| Lead | Appearance | metallic gray | 1.00 | infobox |
| Lead | at T (K) | 978 | 1.00 | infobox |
| Lead | Atomic number (Z) | 82 | 1.00 | infobox |
| Lead | Atomic radius | empirical: 175 pm | 1.00 | infobox |
| Lead | Block | p-block | 1.00 | infobox |
| Lead | Boiling point | 2022 K (1749 °C, 3180 °F) | 1.00 | infobox |
| Lead | Brinell hardness | 38–50 MPa | 1.00 | infobox |
| Lead | Bulk modulus | 46 GPa | 1.00 | infobox |
| Lead | CAS Number | 7439-92-1 | 1.00 | infobox |
| Lead | Covalent radius | 146±5 pm | 1.00 | infobox |
| Lead | Crystal structure | face-centered cubic (fcc) (cF4) | 1.00 | infobox |
| Lead | Density (at 20 °C) | 11.348 g/cm3 | 1.00 | infobox |
| Lead | Discovery | Middle East (7000 BCE) | 1.00 | infobox |
| Lead | Electrical resistivity | 208 nΩ⋅m (at 20 °C) | 1.00 | infobox |
| Lead | Electron configuration | [Xe] 4f14 5d10 6s2 6p2 | 1.00 | infobox |
| Lead | Electronegativity | Pauling scale: 2.33 (in +4), 1.87 (in +2) | 1.00 | infobox |
| Lead | Electrons per shell | 2, 8, 18, 32, 18, 4 | 1.00 | infobox |
| Lead | Group | group 14 (carbon group) | 1.00 | infobox |
| Lead | Heat of fusion | 4.77 kJ/mol | 1.00 | infobox |
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