We Use Cookies
We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from. For more information, please review our cookie policy and privacy policy.
By choosing I Accept, you consent to our use of cookies and other tracking technologies.

Iodine (I)

From Wikipedia, the free encyclopediaIodine is a chemical element with symbol I and atomic number 53. The name is from Greek ἰοειδής ioeidēs, meaning violet or purple, due to the color of iodine vapor. Iodine and its compounds are primarily used in nutrition, and industrially in the production of acetic acid and certain polymers.

Iodine in the periodic table

SymbolI
Atomic number53
Group17
Period5
Blockp
Element categoryNonmetal

Physical properties

Phase at STPSolid
Density4.933 g/cm3
Atomic weight126.904 u
Melting point386.85 K
113.7 °C
236.66 °F
Boiling point457.4 K
184.25 °C
363.65 °F

Atomic properties

Electronegativity (Pauling Scale)2.66
Electron affinity295.153 kJ/mol
Oxidation states−1, +1, +3, +4, +5, +6, +7
(a strongly acidic oxide)
Ionization energies
11008.4 kJ/mol
2 1845.9 kJ/mol
3 3180 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)[Kr] 4d10 5s2 5p5
Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p5
Electrons per shell2, 8, 18, 18, 7

History

Discovered1811
Discovered byBernard Courtois
Warning: Undefined variable $footer in /customers/a/d/1/periodictable.one/httpd.www/inc/footer.php on line 34