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| Atomic Number | 40 |
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| Atomic Symbol | Zr |
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| Atomic Weight | 91.224 amu |
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| Group | Transition, 4 |
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| Form | Solid |
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| Density @ STP | 6.52 g/cm3 |
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| Melting Point | 1855 °C (3371 °F, 2128.15 °K) |
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| Boiling Point | 4409 °C (7968.2 °F, 4682.15 °K) |
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| Heat of Fusion | 21.00 kJ/mol |
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| Heat of Vaporization | 580 kJ/mol |
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| First Ionization Potential | 6.63390 eV |
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| Electronegativity (on Pauling scale) | 1.33 |
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| Specific Heat Capacity | 0.278 J/g K |
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| Ground State Electron Configuration | 4d2 5s2 |
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| Oxidation States | +4 |
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| Stable Isotopes and Natural Abundance on Earth | 90Zr, 51.45%; 91Zr, 11.22%; 92Zr, 17.15%; 94Zr, 17.38%; 96Zr, 2.08% |
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| Selected Radioisotopes | 88Zr, 95Zr |
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| Atomic Radius | 206 pm |
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| Crystal Structure | Hexagonal |
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| Discovered by | Klaproth, 1789
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