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40Zr91.224
Zirconium
Transition MetalZirconium is a chemical element with symbol Zr and atomic number 40. The name of zirconium is taken from the name of the mineral zircon, the most important source of zirconium. The word zircon comes from the Persian word zargun زرگون, meaning "gold-colored".
Phase: SolidAppearance: silvery white
2, 8, 18, 10, 2
Physical Properties
Atomic Mass91.2242 u
Density6.52 g/cm³
Melting Point2128 K
Boiling Point4650 K
Molar Heat25.36 J/(mol·K)
Period5
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d2
Semantic Config[Kr] 4d2 5s2
Shells2, 8, 18, 10, 2
Electron Affinity41.806 kJ/mol
Electronegativity1.33
Ionization Energies
IE1: 640.1 kJ/molIE2: 1270 kJ/molIE3: 2218 kJ/molIE4: 3313 kJ/molIE5: 7752 kJ/molIE6: 9500 kJ/mol
Discovery
Discovered byMartin Heinrich Klaproth