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Roentgenium
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Rg | 111 | 272 | Unknown | Unknown | Solid | Unknown | Metal  |
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| General |
| Name, Symbol, Number |
roentgenium, Rg, 111 |
| Chemical series |
transition metals |
| Group, Period, Block |
11, 7, d |
| Appearance |
unknown, probably yellow or
orange metallic |
| Standard atomic weight |
284 g·mol−1 |
| Electron configuration |
perhaps [Rn] 5f14 6d10 7s1
(guess based on gold) |
| Electrons per shell |
2, 8, 18, 32, 32, 18, 1 |
| Phase |
presumably a solid |
| CAS registry number |
54386-24-2 |
| Selected isotopes |
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| References |
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Roentgenium Compounds
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Source: Wikipedia article Roentgenium
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Chemistry Quick Facts