53
126.9 u
I
Iodine
Halogen
Atomic Structure
Physical State
Group
17
Period
5
Block
p
Electron Configuration
[Kr] 4d¹⁰ 5s² 5p⁵
Physical Properties
Atomic Mass:
126.9 u
Electronegativity:
2.66
Atomic Radius:
198 pm
Ionization Energy:
10.451 eV
Density:
4.94 g/cm³
Melting Point:
386.85 K
Boiling Point:
457.4 K
Historical Information
Discovered By:
Bernard Courtois
Year Discovered:
1811