Nickel vs Copper
Side-by-side comparison of Nickel (Ni, element 28) and Copper (Cu, element 29) by atomic structure and physical properties.
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| Atomic number | 28 | 29 |
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| Symbol | Ni | Cu |
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| Name | Nickel | Copper |
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| Category | transition-metal | transition-metal |
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| Standard Atomic Weight | 58.6934 u | 63.546 u |
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| Period | 4 | 4 |
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| Group | 10 | 11 |
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| Block | d | d |
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| Phase at STP | Solid | Solid |
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| Electron configuration | [Ar]3d84s2 | [Ar]3d104s1 |
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| Oxidation states | [-2, -1, 0, 1, 2, 3, 4] | [-2, 0, 1, 2, 3, 4] |
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| Electronegativity (Pauling) | 1.91 | 1.9 |
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| Electron affinity | 1.156 eV | 1.235 eV |
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| Density | 8912 kg/m³ | 8933 kg/m³ |
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| Melting point | 1454.85 °C | 1084.62 °C |
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| Boiling point | 2912.85 °C | 2561.85 °C |
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| Discovery year | 1751 | N/A |
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Key Differences
| Ni Nickel | Cu Copper |
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| Standard Atomic Weight | 58.6934 u ↓ lower | 63.546 u ↑ higher |
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| Density | 8912 kg/m³ ↓ lower | 8933 kg/m³ ↑ higher |
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| Melting point | 1454.85 °C ↑ higher | 1084.62 °C ↓ lower |
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| Boiling point | 2912.85 °C ↑ higher | 2561.85 °C ↓ lower |
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| Electronegativity (Pauling) | 1.91 ↑ higher | 1.9 ↓ lower |
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| Electron affinity | 1.156 eV ↓ lower | 1.235 eV ↑ higher |
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| Group | 10 | 11 |
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| Electron configuration | [Ar]3d84s2 | [Ar]3d104s1 |
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