Iodin

53
I
Kumpulan
17
Kala
5
Blok
p
Proton
Elektron
Neutron
53
53
74
Ciri-Ciri Am
Nombor atom
53
Berat atom
126.90447
Nombor jisim
127
Kategori
Halogen
Warna
Kelabu
Radioaktif
Tidak
From the Greek word iodes, violet
Struktur hablur
Pusat Tapak Orthorhombic
Sejarah
Iodine was discovered by French chemist Bernard Courtois in 1811.

He treated the liquor obtained from the extraction of kelp, with sulfuric acid to produce a vapour with a violet color.

In 1812, Joseph Louis Gay-Lussac demonstrated that iodine was an element and its chemical relationship to chlorine.
Bilangan elektron per petala
2, 8, 18, 18, 7
Konfigurasi elektron
[Kr] 4d10 5s2 5p5
I
Kelp was the main source of natural iodine in the 18th and 19th centuries
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
4.93 g/cm3
Takat lebur
386.85 K | 113.7 °C | 236.66 °F
Takat didih
457.4 K | 184.25 °C | 363.65 °F
Haba pelakuran
7.76 kJ/mol
Haba pengewapan
20.9 kJ/mol
Muatan haba molar
0.214 J/g·K
Banyak pada kerak bumi
0.000049%
Banyak pada alam semesta
1×10-7%
Pure
Kredit imej: Images-of-elements
Pure crystalline iodine
Nombor CAS
7553-56-2
PubChem CID Number
807
Ciri-Ciri Atom
Jejari atom
140 pm
Jejari kovalen
139 pm
Keelektronegatifan
2.66 (Skala Pauling)
Kebolehan mengion
10.4513 eV
Isipadu atom
25.74 cm3/mol
Daya pengaliran terma
0.00449 W/cm·K
Keadaan pengoksidaan
-1, 1, 3, 5, 7
Aplikasi
Iodine compounds are important in organic chemistry and very useful in medicine.

A solution containing potassium iodide and iodine in alcohol is used to disinfect external wounds.

Silver iodide is a major ingredient to traditional photographic film.

Iodine is added to table salt to prevent thyroid disease.
Elemental iodine is toxic if taken orally
Isotop
Isotop stabil
127I
Isotop tidak stabil
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