| Property | Value |
|---|---|
| Atomic number | 111 |
| Atomic weight | 282 amu |
| Element family | Transition metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | None |
| Previous element | Darmstadtium |
| Next element | Copernicium |
| Density | 23 g/cm3 (STP) |
| Discovery year | 1994 |
Roentgenium is an element number 111 from transition metals family. Its symbol is Rg. Roentgenium atomic weight is 282 amu. Rg has no stable or long lived isotopes. Roentgenium electronic configuration is 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p65f146d97s2. Roentgenium density is 23 g/cm3 (STP). Roentgenium was discovered in 1994.
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