Iodine (I)

General Properties

Symbol I
Atomic Number 53
Atomic Weight 126.90447
Group
17 (fluorine family)
VIIB (IUPAC), VIIA (CAS)
Solid, Insulator, Halogen, Nonmetal, Stable, Natural
Period 5
Block p

Physical Properties

Density 4.93 g/cm3
Atomic Volume 25.7 cm3/mole
Atomic Radius 1.32 angstroms
Covalent Radius 133 pm
Crust Abundance 0.000049%
Crystal Structure Orthorhombic
Color Slate Gray

States

Melting Point 113.5 °C
Boiling Point 184.0 °C
Heat of Fusion 7.76 kJ/mol
Heat of Vaporization 20.9 kJ/mol

Energy

Electronegativity 2.7 (Pauling Scale)
Electron Affinity 295.2 kJ/mol
1st Ionization Energy 1008 kJ/mol
2nd Ionization Energy 1845.9 kJ/mol
3rd Ionization Energy 3180 kJ/mol
Specific Heat Capacity 0.145 J g−1 K−1
Thermal Conductivity 0.449 W·m−1·K−1

Electrons & Oxidation

Oxidation States -1,+5,7
Electrons Per Shell 2 8 18 18 7
Electron Configuration [Kr] 4d10 5s2 5p5
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p5
Orbital Diagram
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4f
 
 
 
 
 
 
 
5s
↿⇂
5p
↿⇂
↿⇂
↿ 
5d
 
 
 
 
 
5f
 
 
 
 
 
 
 

Nuclear

Radioactive No

Media

Planetary Bohr Model of Iodine (I)
Lewis Dot Diagram of Iodine (I)
Description
Shiny, black, non-metalic solid; as a gas it is violet and intensely irritating to the eyes, nose and throat.
Uses
Required in small amounts by humans. Once used as an antiseptic, but no longer due to its poisonous nature.
Sources
Occurs on land and in the sea in sodium and potassium compounds.
Pronounciation (English)
EYE-eh-dine

Translations

Afrikaans Jodium
Aragonese Yodo
العربية يود
Armãneashte Iodu
Asturian Yodu
azərbaycan Yod
български Йод
বাংলা আয়োডিন
brezhoneg Iod
bosanski Jod
Byelorussian Ёд
Cebuano Yodo
čeština Jod
Chuvash Иод
Cymraeg Iode
dansk Jod
Deutsch Jod
Ελληνικά Ιωδιο
English Iodine
esperanto Jodo
español Yodo
eesti Jood
euskara Iodoa
فارسی ید
suomi Jodi
føroyskt Jod
français Iode
Friulian Jodi
Western Frisian Joadium
Gaeilge Iaidín
Scottish Gaelic Ìodain
galego Iodo
ગુજરાતી આયોડિનનો
Gaelg Eeadeen
Hakka Tièn (碘)
עברית יוד
हिंदी आयोडिन
hrvatski Jod
magyar Jód
հայերեն Յոդ
Bahasa Indonesia Yodium
íslenska Joð
italiano Iodio
日本語 ヨウ素
ქართული იოდი
کٲشُر Jód
қазақ тілі Йод
한국어 요오드, 2아이오딘
Kurdish İyot
Komi Йод
kernewek Eyodyn
кыргызча Йод
Latin Iodium
Luxembourgish Jod
Lombard Jòdi
lingála Ide
lietuvių Jodas
latviešu Jods
Mari Йод
Maori Iodine
македонски Јод
മലയാളം അയോഡിന്‍
монгол Иод
Мокшан Йода
Bahasa Melayu Iodin, ²Yodium
Malti Jodju
Nahuatl Yodo
Nederlands Jood
norsk Jod
Occitan Iòde
Ossetic Йод
polski Jod
português Iodo
Quechua Yudu, ²Yodu
română Iod
русский Йод
slovenčina Jód
slovenščina Jod
Samoan Dyodi
Samogitian Juods
Shqip Jod
Српски Јод
Southern Sotho Ayotine
svenska Jod
Kiswahili Iodini, ²Aidini
தமிழ் அயடின்
Tajik Йод
ไทย ไอโอดีน
Türkçe İyod
Uyghur يود
українська Йод
oʻzbekcha Yod
Tiếng Việt Iot, Iođ
Võro Juut
中文

History

Discovered In
1811
Discovered By
Bernard Courtois
Discovered At
France
Word Origin
From the Greek word "iodes" meaning "violet"