Zr
Zirconium
Element 40 · Transition metal · Period 5, Group 4
Solid · Discovered 1789
Atomic Properties
| Atomic Number | 40 |
| Atomic Mass | 91.22u |
| Electron Configuration | [Kr]5s2 4d2 |
| Electronegativity | 1.33Pauling |
| Atomic Radius | 186pm |
| Ionization Energy | 6.634eV |
| Electron Affinity | 0.426eV |
| Oxidation States | +4 |
Physical Properties
| Standard State | Solid |
| Melting Point | 2128K |
| Boiling Point | 4682K |
| Density | 6.52g/cm³ |
| Group Block | Transition metal |
| Year Discovered | 1789 |