77
Ir
Iridium
192.217 | 2
8
18
32
15
2
|
77
Ir
Iridium
192.217 | 2
8
18
32
15
2
|
| General |
|---|
| Name | Iridium | | Symbol | Ir | | Number | 77 | | Chemical series | Transition elements | | Group / Period | 9 / 6 | | Block | d-block | | CAS registry number | 7439-88-5 |
| Physical properties |
|---|
| State | solid | | Density | 22.42 g/cm3 | | Melting point | 2739 K (2466 °C, 4471 °F) | | Boiling point | 4701 K (4428 °C, 8002 °F) | | Critical point | |
| Atomic properties |
|---|
| Atomic Weight | 192.217 g/mol | | Crystal structure | cubic face centered | | Electronegativity | 2.20 | | Atomic radius | 135 pm | | Atomic radius (calculated) | 180 pm | | Electron configuration | [Xe] 4f14 5d7 6s2 | | Electrons per shell | 2, 8, 18, 32, 15, 2 | | Number of protons | 77 | | Number of neutrons | 115 |
|
Platinum