Zirconium

Symbol: Zr
Atomic number: 40
Category: transition metals
Group: 4
Period: 5
Block: d
Atomic weight: 91.224 g/mol
Electrons per shell: 2, 8, 18, 10, 2
CAS number: 7440-67-7
Phase: solid
Density: 6.52 kg/l (near room temperature)
Melting point: 2128 K (1855C, 3371F)
Boiling point: 4682 K (4409C, 7968F)
Crystal structure: hexagonal close-packed
Oxidation states: 4, 3, 2, 1
Electronegativity: 1.33 (Pauling scale)
Name's origin: zargono
Name's meaning: gold like
Facts:
- is used as an alloying agent due to its high resistance to corrosion
- is never found as a native metal, but is instead obtained mainly from the mineral zircon
- is a lustrous, grayish-white, soft, ductile, and malleable metal
- is highly resistant to corrosion by alkalis, acids, salt water, and other agents