IODINE


Atomic Number:53 
Mass Number: 126.90447
Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰4p⁵
Melting Point: 113^oC
First Ionization Energy: 1008 kJ/mol
Electronegativity: 2.7
Atomic Radius: 133 pm
Ionic Radius: 216 pm