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Zinc(Zn)
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Zirconium(Zr)
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| Atomic weight | 65.38 | 91.22 |
| Atomic volume | 9.2 (cm3/mol) | 14.1 (cm3/mol) |
| discovered | 11/30/1599 | 11/30/1788 |
| state (s, l, g) | s | s |
| melting point | 692.78 (K) | 2,125.2 (K) |
| boiling point | 1,180 (K) | 4,473 (K) |
| electronegativity | 1.65 | 1.33 |
| electron affinity | ... | 41.1 (kJ/mole) |
| Shells | 2,8,18,2 | 2,8,18,10,2 |
| electron configuration | [Ar] 3d10 4s2 | [Kr] 4d2 5s2 |
| structure | distorted hcp structure | hcp: hexagonal close pkd |
| uses | batteries, galvanizing | deodorants, fuel rod clad |
| hardness | 2.5 (mohs) | ... |
| characteristics | brittle | hard, relatively inert |
| reaction with air | vigorous, =>ZnO | mild, w/ht =>Zr2O3 |
| number of isotopes | 5 | 5 |
| hydride(s) | ZnH2 | ZrH2 |
| oxide(s) | ZnO | ZrO2 |
| chloride(s) | ZnCl2 | ZrCl3 ZrCl4 |
| image |  |  |
| thermal conductivity | 116 J/m-sec-deg | ... |
| electrical conductivity | 169.033 1/mohm-cm | 25 1/mohm-cm |
| polarizability | 6.4 (A^3) | ... |
| source | Sphalerite (sulfide) | Zircon (silicate) |
| abundance earth's crust | 1.79 (log) | 2.24 (log) |
| cost, pure | 3.7 $/100g | 16 $/100g |
| cost, bulk | 0.12 $/100g | 16 $/100g |
| rel. abund. solar system | 3 (3) | 1 (1) |
| Density @ 293 K | 7 (7) | 6 (6) |
What do you think?
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