Copernicium vs Nihonium
Side-by-side comparison of Copernicium (Cn, element 112) and Nihonium (Nh, element 113) by atomic structure and physical properties.
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| Atomic number | 112 | 113 |
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| Symbol | Cn | Nh |
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| Name | Copernicium | Nihonium |
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| Category | transition-metal | post-transition-metal |
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| Standard Atomic Weight | 285 u | 286 u |
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| Period | 7 | 7 |
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| Group | 12 | 13 |
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| Block | d | p |
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| Phase at STP | Gas | Solid |
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| Electron configuration | [Rn]5f146d107s2 (Predicted) | [Rn]5f146d107s27p1 (Predicted) |
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| Oxidation states | [2, 4] | N/A |
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| Electronegativity (Pauling) | N/A | N/A |
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| Electron affinity | -0.8 eV | 0.69 eV |
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| Density | 1.4e+4 kg/m³ | 1.6e+4 kg/m³ |
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| Melting point | N/A | 426.85 °C |
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| Boiling point | -165.15 °C | 1156.85 °C |
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| Discovery year | 1996 | 2004 |
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Key Differences
| Cn Copernicium | Nh Nihonium |
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| Standard Atomic Weight | 285 u ↓ lower | 286 u ↑ higher |
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| Density | 1.4e+4 kg/m³ ↓ lower | 1.6e+4 kg/m³ ↑ higher |
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| Boiling point | -165.15 °C ↓ lower | 1156.85 °C ↑ higher |
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| Electron affinity | -0.8 eV ↓ lower | 0.69 eV ↑ higher |
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| Group | 12 | 13 |
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| Block | d | p |
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| Category | transition-metal | post-transition-metal |
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| Phase at STP | Gas | Solid |
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| Electron configuration | [Rn]5f146d107s2 (Predicted) | [Rn]5f146d107s27p1 (Predicted) |
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| Discovery year | 1996 | 2004 |
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