What are the basic properties of Roentgenium?
Roentgenium (symbol: Rg) is a transition metal with atomic number 111. Its atomic mass is 282.0 u, and it belongs to period 7 and group 11.
Roentgenium (Rg) Properties and Facts
Element 111 - Transition Metal
What is the electron configuration of Roentgenium?
The electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 6s²
What are the physical properties of Roentgenium?
Melting point: 2400.0 K
Boiling point: 2400.0 K
Density: 28.7 g/cm³
What are the known isotopes of Roentgenium?
- Rg-272: Half-life of 1.0 milliseconds
- Rg-273: Half-life of 0.6 milliseconds
- Rg-274: Half-life of 0.5 milliseconds
- Rg-275: Half-life of 0.4 milliseconds
- Rg-276: Half-life of 0.3 milliseconds
What is the biological role and occurrence of Roentgenium?
Biological role: Highly radioactive and toxic
Natural occurrence: Synthetic element