Iridium

Statistics:

• Name: Iridium
• Symbol: Ir
• Classification: Transition Metal
• Atomic Number: 77
• Atomic Mass: 192.217 g/mol
• Density: 22.65 g/cm³
• Melting: 2410°C
• Boiling: 4130°C
• Protons & Electrons:77
• Neutrons:115
• Discovered: 1803
• Discovered By: Tennant
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 32
• Level 5: 15
• Level 6: 2

Isotopes:

Isotope: Half-life

• ¹⁸⁸Ir: 41.5 h
• ¹⁸⁹Ir: 13.2 d
• ¹⁹⁰Ir: 11.78 d
• ^190m1Ir: 1.2 h
• ^190m2Ir: 3.25 h
• ¹⁹¹Ir: stable
• ¹⁹²Ir: 73.831 d
• ¹⁹³Ir: stable
• ^193m1Ir: 10.53 d
• ¹⁹⁴Ir: 19.28 h
• ^194m1Ir: 31.85 ms

Brief Summary

Iridium is a Transition Metal with the symbol 'Ir' and contains 77 Protons & Electrons with 115 neutrons in the nucleus of the atom. Iridium has an atomic mass of 192.217 g/mol and, at a temperature of 20°C, has a density of 22.65 g/cm³. It will melt at a temperature of 2410°C and boil at 4130°C.

Iridium was discovered by Tennant in 1803 and is named 'Iridium' Latin word "iridis" meaning "rainbow".

Some common usages for Iridium: tip gold pens, crucible and special containers.

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

Iridium :: Ir :: 77 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/iridium.html>.