Properties

CAS Number7553-56-2
PubChem CID807
Atomic Radius140
Atomic Volume25.74
Atomic Weight126.904
Blockp
Boiling Point184.25
Bulk Modulus
CategoryHalogens
Crystal StructureBase Centered Orthorhombic
ColorSlate Gray
Covalent Radius139
Density4.93
Electrical Resistivity
Electron Configuration[Kr] 4d10 5s2 5p5
Electrons per shell2, 8, 18, 18, 7
Electronegativity2.66
Electrons53
Group17
Heat of Fusion7.76
Heat of Vaporization20.9
Ionization Potential10.451
Magnetic Ordering
Magnetic Susceptibility
Mass126.904
Mass Number53
Melting Point113.7
NameIodine
Neutrons74
Atomic Number127
Oxidation States-1, 1, 3, 5, 7
Period5
PhaseSolid
Poisson Ratio
Protons53
Shear Modulus
Specific Heat Capacity0.214
SymbolI
Thermal Conductivity0.004
Van der Waals radius
Young's Modulus
Abundance
Abundance in Earth's crust0.000049%
Abundance in Universe1×10-7%
I Iodine 53 126.90447 17 5 p 53 113.5 184.0 [Kr] 4d10 5s2 5p5 2 8 18 18 7 4.93 0.000049% SlateGray Orthorhombic 2.7 2.359 {"1":"1008.4","2":"1845.9","3":"3180"} 1008 295.2 133 -1,+5,7 1.32 25.7 7.76 20.9 0.145 0.449 0 Solid, Insulator, Halogen, Nonmetal, Stable, Natural EYE-eh-dine Shiny, black, non-metalic solid; as a gas it is violet and intensely irritating to the eyes, nose and throat. Required in small amounts by humans. Once used as an antiseptic, but no longer due to its poisonous nature. Occurs on land and in the sea in sodium and potassium compounds. ARXSnu8ImqQ Iodine
Zirconium was first recognized as an element by Martin Heinrich Klaproth in 1789, in Berlin, in a sample of zircon from Sri Lanka.

Zirconium metal was first obtained in an impure form in 1824 by Jöns Jakob Berzelius by heating a mixture of potassium and potassium zirconium fluoride in an iron tube.

Dutch scientists Anton Eduard van Arkel and Jan Hendrik de Boer discovered a method for producing high purity zirconium in 1925. From the Persian zargun, gold like 53 1811 Bernard Courtois France From the Greek word "iodes" meaning "violet"

Isotopes of Zirconium

Standard Atomic Weight

126.90447(3)

Stable Isotopes

127I

Unstable Isotopes

108I 109I 110I 111I 112I 113I 114I 115I 116I 117I 118I 119I 120I 121I 122I 123I 124I 125I 126I 128I 129I 130I 131I 132I 133I 134I 135I 136I 137I 138I 139I 140I 141I 142I 143I 144I

Zirconium is considered to be non-toxic
The most common oxide is zirconium dioxide, also referred to as zirconia
Zirconium is mainly used as a refractory and opacifier, although it is used in small amounts as an alloying agent for its strong resistance to corrosion.

Zirconium is used as to make surgical instruments and is used in steel alloys as a hardening agent.

Zirconium is also used to make superconductive magnets.