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Iodine is a chemical element. The name is from Greek ἰοειδής ioeidēs, meaning violet or purple, due to the color of elemental iodine vapor.(Wiki) 

Name Iodine
Atomic Number 53
Atomic Weight 126.90447
Symbol I
Melting Point ( °C ) 113.7 °C
Boiling Point ( °C ) 184.3 °C
Density (g/cm3) 4.933
Earth crust (%) 0.490
Discovery (Year) 1811
Group 17
Electron configuration Kr 4d10 5s2 5p5
Ionization energy (eV) 1008.4


Iodine was discovered by Bernard Courtois in 1811.


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