Name: Iridium
Symbol: Ir
Atomic Number: 77
Atomic Mass: 192.217 amu
Melting Point: 2410.0 °C (2683.15 °K, 4370.0 °F)
Boiling Point: 4527.0 °C (4800.15 °K, 8180.6 °F)
Number of Protons/Electrons: 77
Number of Neutrons: 115
Crystal Structure: Cubic
Density @ 293 K: 22.5 g/cm3
Color: white
Atomic Structure
![[Bohr Model of Iridium]](b0077.gif) |
Number of Energy Levels: 6 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 18 Fourth Energy Level: 32 Fifth Energy Level: 15 Sixth Energy Level: 2 |
Isotopes
| Isotope | Half Life |
| Ir-188 | 1.7 days |
| Ir-189 | 13.2 days |
| Ir-190 | 11.8 days |
| Ir-190m | 1.2 hours |
| Ir-190m2 | 3.2 hours |
| Ir-191 | Stable |
| Ir-192 | 73.8 days |
| Ir-193 | Stable |
| Ir-193m | 10.5 days |
| Ir-194 | 19.3 hours |
| Ir-194m | 170.0 days |
Facts
Date of Discovery: 1804Discoverer: S. Tenant
Name Origin: From the Latin word iridis (rainbow)
Uses: tip gold pens, crucible and special containers
Obtained From: gravel deposits with platinum
Information provided by: http://www.chemicalelements.com