Zirconium
chemical element
zirconium (Zr), chemical element, metal of Group 4 (IVb) of the periodic table, used as a structural material for nuclear reactors.
| atomic number | 40 |
|---|---|
| atomic weight | 91.22 |
| melting point | 1,852 °C (3,366 °F) |
| boiling point | 3,578 °C (6,472 °F) |
| specific gravity | 6.49 at 20 °C (68 °F) |
| oxidation state | +4 |
| electron configuration | [Kr]4d25s2 |
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