40Zr
Zirconium
지르코늄 · ジルコニウム
Transition metal
Atomic number40
ElementZr — Zirconium
Atomic mass91.224
CategoryTransition metal
Group4
Period5
Electron config[Kr] 4d2 5s2
Shells2,8,18,10,2
State (RT)Solid
Melting pt1855°C
Boiling pt4409°C
Electronegativity1.33
Discovered1789
Main usesNuclear reactors, ceramics
2 · 8 · 18 · 10 · 2