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Plutonium is a chemical element; it has symbol Pu and atomic number 94. It is a silvery-gray actinide metal that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. It reacts with carbon, halogens, nitrogen, silicon and hydrogen. When exposed to moist air, it forms…
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nuclear element used uranium fission plutonium-239 form first also metal reactors decay isotopes atomic neutrons half-life found radiation years weapons
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Plutonium | (near r.t.) | 20.26 g/cm3 α-244 Pu | 1.00 | infobox |
| Plutonium | 236Pu | synth | 1.00 | infobox |
| Plutonium | 238Pu | trace | 1.00 | infobox |
| Plutonium | 239Pu | trace | 1.00 | infobox |
| Plutonium | 240Pu | trace | 1.00 | infobox |
| Plutonium | 241Pu | synth | 1.00 | infobox |
| Plutonium | 242Pu | synth | 1.00 | infobox |
| Plutonium | 244Pu | trace | 1.00 | infobox |
| Plutonium | Allotropes | see Allotropes of plutonium | 1.00 | infobox |
| Plutonium | Appearance | silvery white, tarnishing to dark gray in air | 1.00 | infobox |
| Plutonium | at T (K) | 1756 | 1.00 | infobox |
| Plutonium | Atomic number (Z) | 94 | 1.00 | infobox |
| Plutonium | Atomic radius | empirical: 159 pm | 1.00 | infobox |
| Plutonium | Block | f-block | 1.00 | infobox |
| Plutonium | Boiling point | 3505 K (3228 °C, 5842 °F) | 1.00 | infobox |
| Plutonium | CAS Number | 7440-07-5 | 1.00 | infobox |
| Plutonium | Covalent radius | 187±1 pm | 1.00 | infobox |
| Plutonium | Crystal structure | monoclinic (mP16) | 1.00 | infobox |
| Plutonium | Density (at 20° C) | 19.85 g/cm3 α-239 Pu | 1.00 | infobox |
| Plutonium | Discovery | Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan (1940–1941) | 1.00 | infobox |
| Plutonium | Electrical resistivity | 1.460 µΩ⋅m (at 0 °C) | 1.00 | infobox |
| Plutonium | Electron configuration | [Rn] 5f6 7s2 | 1.00 | infobox |
| Plutonium | Electronegativity | Pauling scale: 1.28 | 1.00 | infobox |
| Plutonium | Electrons per shell | 2, 8, 18, 32, 24, 8, 2 | 1.00 | infobox |
| Plutonium | Group | f-block groups (no number) | 1.00 | infobox |
| Plutonium | Heat of fusion | 2.82 kJ/mol | 1.00 | infobox |
| Plutonium | Heat of vaporization | 333.5 kJ/mol | 1.00 | infobox |
| Plutonium | Ionization energies | 1st: 584.7 kJ/mol | 1.00 | infobox |
| Plutonium | Lattice constants | a = 0.6183 nm b = 0.4822 nm c = 1.0964 nm β = 101.79° (at 20 °C) | 1.00 | infobox |
| Plutonium | Magnetic ordering | paramagnetic | 1.00 | infobox |
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