Comparisons / Comparison of Meitnerium and Roentgenium

Comparison of Meitnerium and Roentgenium [S]ave

Attribute
Roentgenium ×
Meitnerium ×
Discovered (year)19941982
Atomic number111109
Group nameTransition metalTransition metal
Oxidation states
  • -1
  • 1
  • 3
  • 5
  • 1
  • 3
  • 4
  • 6
  • 8
  • 9
Electron configuration[Rn]7s²5f¹⁴6d⁹ (predicted)[Rn]7s²5f¹⁴6d⁷ (calculated)
Atomic mass (u)282.169277.154
Standard stateSolid (expected)Solid
SymbolRgMt



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