Periodic table of the elements
YttriumZirconiumNiobium
40
Zr
Zirconium
91.224
2
8
18
10
2
40
Zr
Zirconium
91.224
2
8
18
10
2
General
NameZirconium
SymbolZr
Number40
Chemical seriesTransition elements
Group / Period4 / 5
Blockd-block
CAS registry number7440-67-7

Physical properties
Statesolid
Density6.52 g/cm3
Melting point2128 K (1855°C, 3371°F)
Boiling point4682 K (4409°C, 7968°F)
Critical point

Atomic properties
Atomic Weight91.224 g/mol
Crystal structurehexagonal close-packed
Electronegativity1.33
Atomic radius155 pm
Atomic radius (calculated)206 pm
Electron configuration[Kr] 4d2 5s2
Electrons per shell2, 8, 18, 10, 2
Number of protons40
Number of neutrons51

Other languages
SpanishCirconio
PortugueseZircónio
FrenchZirconium
GermanZirconium
ItalianZirconio
RussianЦирконий
PolishCyrkon
Chinese
Arabicزركونيوم
TurkishZirkonyum
DutchZirkonium


Periodic table of the elements
YttriumZirconiumNiobium