53 I 126.904473

Iodine

DIATOMIC NONMETAL

Phase: Solid

Discovered: Bernard Courtois

Block: P

Summary

Iodine 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.

Appearance: lustrous metallic gray, violet as a gas

Source: Wikipedia

Physical Properties

Atomic Mass 126.904473 u

Density 4.933 g/cm³

Melting Point 386.85 K

Boiling Point 457.4 K

Molar Heat N/A

Electron Affinity 295.1531 kJ/mol

Ionization Energies

1^st: 1008.4 kJ/mol

2^nd: 1845.9 kJ/mol

3^rd: 3180 kJ/mol