Ir
Iridium
Chikamu 77 · 192.22 u
Iridium ndiyo yakanyanya kuomarara-inodzivirira simbi uye yakapa zviratidzo zvakakosha zvekuparadzwa kwedinosaur.
Maitiro ekushandisa
| Atomic radius: | 192.22 u |
| Kuomarara | 22.56 g/cm³ |
| Kutonhora Point | 2719.0 K |
| Kutonhora Point | 4701.0 K |
| Kuoneka | Silvery- white metallic |
| State at Room Temp | _Kukanganisa: |
Chemical zvinhu
| Electronegativity | 2.2 (Pauling) |
| 1st Ionization Energy | 880.0 kJ/mol |
| Electronegativity: | 150.94 kJ/mol |
| Oxygen | +1, +2, +3, +4, +5, +6 |
Atomic Properties
| Kuisa Kugadzirisa | [Xe] 4f14 5d7 6s2 |
| Atomic radius: | 136.0 pm |
| Covalent Radius | 141.0 pm |
| Van der Waals radius | 202.0 pm |
Discovery
| Yakawanikwa ne | Smithson Tennant |
| Kuonekwa kwegore | 1803 |
| _Panzvimbo: | London, England |
| Akapihwa zita mushure me | Latin 'iris' zvinoreva mhere, nekuda kwezvinwiwa zvayo zvakasiyana-siyana |
Nezve Iridium
Iridium iri nyore kwazvo, yakaoma, silvery-white simbi inodzivirira kune ese acids uye yakachena simbi. Iridium-yakapfuma layer mu geological strata pasi rese yakaratidza kuti asteroid kukonzera kuuraya dinosaur. Iridium inowanzoshandiswa semushonga wekudzivirira uye kubvisa mvura kubva muzvisikwa.
Mashandisiro & Maapplication
Spark plugs, crucibles yekristaro kukura, uye deep-sea drilling pipe.
Nhoroondo yemitambo
A thin layer of iridium in 66-million-year-old rock worldwide proved an asteroid caused the dinosaur extinction.
Isotopes
| Mamwe marudzi ezvinyorwa | Kuwanda | Half-Life | _Kuchengeta |
| 191 | 0.373% | - | _Ndiani |
| 193 | 0.627% | - | _Ndiani |
Kuisa Kugadzirisa
[Xe] 4f14 5d7 6s2