 |
|
| ନାମ, ପ୍ରତୀକ | platinum, Pt |
|---|
| Appearance | grayish white |
|---|
| ଉଚ୍ଚାରଣ | |
|---|
|
|
|
| ପରମାଣୁ କ୍ରମାଙ୍କ (Z) | 78 |
|---|
| ଶ୍ରେଣୀ, ବ୍ଳକ | group 10, d-block |
|---|
| ପର୍ଯ୍ୟାୟ | period 6 |
|---|
| ମୌଳିକ ପ୍ରକାର | transition metal |
|---|
| ମାନକ ପରମାଣବିକ ଓଜନ (Ar) | 195.084 |
|---|
| ଇଲେକ୍ଟ୍ରୋନ୍ ବିନ୍ୟାସ | [Xe] 4f14 5d9 6s1 |
|---|
per shell | 2, 8, 18, 32, 17, 1 |
|---|
|
| ଅବସ୍ଥା | solid |
|---|
| ଗଳନାଙ୍କ | 2041.4 K (1768.3 °C, 3214.9 °F) |
|---|
| ସ୍ଫୁଟନାଙ୍କ | 4098 K (3825 °C, 6917 °F) |
|---|
| Density near r.t. | 21.45 g/cm3 |
|---|
| when liquid, at m.p. | 19.77 g/cm3 |
|---|
| Heat of fusion | 22.17 kJ/mol |
|---|
| Heat of | 469 kJ/mol |
|---|
| Molar heat capacity | 25.86 J/(mol·K) |
|---|
pressure
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
2330 |
(2550) |
2815 |
3143 |
3556 |
4094 |
|
|
| Oxidation states | 6, 5, 4, 3, 2, 1, −1, −2, −3
(mildly basic oxide) |
|---|
| Electronegativity | Pauling scale: 2.28 |
|---|
| Atomic radius | empirical: 139 pm |
|---|
| Covalent radius | 136±5 pm |
|---|
| Van der Waals radius | 175 pm |
|---|
|
| Crystal structure | face-centered cubic (fcc) |
|---|
| Speed of sound thin rod | 2800 m/s (at r.t.) |
|---|
| Thermal expansion | 8.8 µm/(m·K) (at 25 °C) |
|---|
| Thermal conductivity | 71.6 W/(m·K) |
|---|
| Electrical resistivity | 105 n Ω·m (at 20 °C) |
|---|
| Magnetic ordering | paramagnetic |
|---|
| Young's modulus | 168 GPa |
|---|
| Shear modulus | 61 GPa |
|---|
| Bulk modulus | 230 GPa |
|---|
| Poisson ratio | 0.38 |
|---|
| Mohs hardness | 4–4.5 |
|---|
| Vickers hardness | 549 MPa |
|---|
| Brinell hardness | 392 MPa |
|---|
| CAS Number | 7440-06-4 |
|---|
|
| ଆବିଷ୍କାର | Antonio de Ulloa (1735) |
|---|
| First isolation | Antonio de Ulloa (1735) |
|---|
|
|
|
| | references |
