Darmstadtium vs Roentgenium
Side-by-side comparison of Darmstadtium (Ds, element 110) and Roentgenium (Rg, element 111) by atomic structure and physical properties.
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| Atomic number | 110 | 111 |
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| Symbol | Ds | Rg |
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| Name | Darmstadtium | Roentgenium |
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| Category | transition-metal | transition-metal |
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| Standard Atomic Weight | 281 u | 282 u |
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| Period | 7 | 7 |
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| Group | 10 | 11 |
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| Block | d | d |
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| Phase at STP | N/A | N/A |
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| Electron configuration | [Rn]5f146d87s2 (Predicted) | [Rn]5f146d97s2 (Predicted) |
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| Oxidation states | [0, 2, 4, 6, 8] | [-1, 1, 3, 5] |
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| Electronegativity (Pauling) | N/A | N/A |
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| Electron affinity | 1.6 eV | 1.565 eV |
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| Density | 3.48e+4 kg/m³ | 2.87e+4 kg/m³ |
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| Melting point | N/A | N/A |
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| Boiling point | N/A | N/A |
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| Discovery year | 1994 | 1994 |
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Key Differences
| Ds Darmstadtium | Rg Roentgenium |
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| Standard Atomic Weight | 281 u ↓ lower | 282 u ↑ higher |
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| Density | 3.48e+4 kg/m³ ↑ higher | 2.87e+4 kg/m³ ↓ lower |
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| Electron affinity | 1.6 eV ↑ higher | 1.565 eV ↓ lower |
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| Group | 10 | 11 |
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| Electron configuration | [Rn]5f146d87s2 (Predicted) | [Rn]5f146d97s2 (Predicted) |
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