109Mt
Meitnerium
마이트너륨 · マイトネリウム
Transition metal
Atomic number109
ElementMt — Meitnerium
Atomic mass278
CategoryTransition metal
Group9
Period7
Electron config[Rn] 5f14 6d7 7s2 (est.)
Shells2,8,18,32,32,15,2
State (RT)Solid (est.)
Melting ptNo data
Boiling ptNo data
Discovered1982
Main usesResearch only (superheavy)
2 · 8 · 18 · 32 · 32 · 15 · 2