40
91.224 u
Zr
Zirconium
Transition Metal
Atomic Structure
Physical State
Group
4
Period
5
Block
d
Electron Configuration
[Kr] 4d² 5s²
Physical Properties
Atomic Mass:
91.224 u
Electronegativity:
1.33
Atomic Radius:
186 pm
Ionization Energy:
6.634 eV
Density:
6.506 g/cm³
Melting Point:
2128 K
Boiling Point:
4682 K
Historical Information
Discovered By:
Martin Heinrich Klaproth
Year Discovered:
1789