Iodine

Statistics:

• Name: Iodine
• Symbol: I
• Classification: Halogen
• Atomic Number: 53
• Atomic Mass: 126.90447 g/mol
• Density: 4.94 g/cm³
• Melting: 113.5°C
• Boiling: 184.4°C
• Protons & Electrons:53
• Neutrons:74
• Discovered: 1811
• Discovered By: Courtois
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 18
• Level 5: 7

Isotopes:

Isotope: Half-life

• ¹²²I: 3.63 minutes
• ¹²³I: 13.27 hours
• ¹²⁴I: 4.1760 days
• ¹²⁵I: 59.408 days
• ¹²⁶I: 13.11 days
• ¹²⁷I: stable
• ¹²⁸I: 24.99 minutes
• ¹²⁹I: 1.57e7 years
• ¹³⁰I: 12.36 hours
• ¹³¹I: 8.02070 days
• ¹³²I: 2.295 hours
• ¹³³I: 20.8 hours
• ¹³⁴I: 52.5 minutes
• ¹³⁵I: 6.57 hours
• ¹³⁶I: 83.4 seconds

Brief Summary

Iodine is a Halogen with the symbol 'I' and contains 53 Protons & Electrons with 74 neutrons in the nucleus of the atom. Iodine has an atomic mass of 126.90447 g/mol and, at a temperature of 20°C, has a density of 4.94 g/cm³. It will melt at a temperature of 113.5°C and boil at 184.4°C.

Iodine was discovered by Courtois in 1811 and is named 'Iodine' Greek word "iôdes" meaning "violet".

Some common usages for Iodine: human-beings need it.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Iodine :: I :: 53 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/iodine.html>.