| Platinum |
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78Pt |
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| Panagway |
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grayish white
 |
| Kinatibuk-ang mga kinaiya |
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| Ngalan,simbolo,kaiphan | platinum, Pt, 78 |
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| Paglitok | /ˈplætᵻnəm/ |
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| Kategoriyang elemento | puthaw nga transisyon |
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| Group,period,block | 10, 6,d |
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| Gibug-aton sa atomo | 195.084 |
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| Kontorno sa elektron | [Xe] 4f14 5d9 6s1
2, 8, 18, 32, 17, 1 Electron shells of platinum (2, 8, 18, 32, 17, 1) |
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| History |
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| Pagkadiskobre | Antonio de Ulloa (1735) |
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| First isolation | Antonio de Ulloa (1735) |
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| Physical properties |
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| Phase | magahi |
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| Density (nearr.t.) | 21.45 g·cm−3 |
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| Liquiddensity atm.p. | 19.77 g·cm−3 |
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| Melting point | 2041.4 K, 1768.3 °C, 3214.9 °F |
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| Boiling point | 4098 K, 3825 °C, 6917 °F |
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| Heat of fusion | 22.17kJ·mol−1 |
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| Heat of vaporization | 469 kJ·mol−1 |
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| Molar heat capacity | 25.86 J·mol−1·K−1 |
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| Vapor pressure |
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| P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k | | at T (K) | 2330 | (2550) | 2815 | 3143 | 3556 | 4094 |
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| Atomic properties |
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| Oxidation states | 6, 5,4, 3, 2, 1, −1, −2, −3
(mildlybasic oxide) |
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| Electronegativity | 2.28 (Pauling scale) |
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| Ionization energies | 1st: 870 kJ·mol−1 |
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| 2nd: 1791 kJ·mol−1 |
| Atomic radius | 139pm |
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| Covalent radius | 136±5 pm |
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| Van der Waals radius | 175 pm |
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| Miscellanea |
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| Crystal structure | face-centered cubic |
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| Magnetic ordering | paramagnetic |
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| Electrical resistivity | (20 °C) 105 nΩ·m |
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| Thermal conductivity | 71.6 W·m−1·K−1 |
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| Thermal expansion | (25 °C) 8.8 µm·m−1·K−1 |
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| Speed of sound (thin rod) | (r.t.) 2800 m·s−1 |
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| Tensile strength | 125-240 MPa |
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| Young's modulus | 168 GPa |
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| Shear modulus | 61 GPa |
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| Bulk modulus | 230 GPa |
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| Poisson ratio | 0.38 |
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| Mohs hardness | 4–4.5 |
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| Vickers hardness | 549 MPa |
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| Brinell hardness | 392 MPa |
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| CAS registry number | 7440-06-4 |
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| Most stable isotopes |
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| Main article:Isotopes of platinum |
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| ·r |
