![[ATOM]](atom.gif) |
Iridium
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Information valid for Ir-192 unless otherwise noted
Basic Information
Symbol: Ir
Atomic Number: 77
Mass: 192.217
Melting Point: 2410.0 C
Boiling Point: 4527.0 C
Number of Protons/Electrons: 77
Number of Neutrons: 115
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 22.5 g/cm3
Color: white
Atomic Structure
![[Bohr Model of Iridium]](b0077.gif) |
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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
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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: 1804
Discoverer: S. Tenant
Name Origin: From the Latin word iridis (rainbow)
Uses: tip gold pens, crucible and special containers
Obtained From: gravel deposits with platinum