Comparisons / Comparison of Meitnerium and Roentgenium

Comparison of Meitnerium and Roentgenium [S]ave

Attribute
Meitnerium
×

Roentgenium
×
1Discovered (year)19821994
Atomic number109111
Group nameTransition metalTransition metal
Oxidation states
  • 1
  • 3
  • 4
  • 6
  • 8
  • 9
  • -1
  • 1
  • 3
  • 5
Electron configuration[Rn]7s²5f¹⁴6d⁷ (calculated)[Rn]7s²5f¹⁴6d⁹ (predicted)
Atomic mass (u)277.154282.169
Standard stateSolidSolid (expected)
SymbolMtRg



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