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ନାମ, ପ୍ରତୀକ | gold, Au |
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Appearance | metallic yellow |
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ଉଚ୍ଚାରଣ | |
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ପରମାଣୁ କ୍ରମାଙ୍କ (Z) | 79 |
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ଶ୍ରେଣୀ, ବ୍ଳକ | group 11, d-block |
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ପର୍ଯ୍ୟାୟ | period 6 |
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ମୌଳିକ ପ୍ରକାର | transition metal |
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ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar) | 196.966569(4) |
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ଇଲେକ୍ଟ୍ରୋନ୍ ବିନ୍ୟାସ | [Xe] 4f14 5d10 6s1 |
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per shell | 2, 8, 18, 32, 18, 1 |
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ଅବସ୍ଥା | solid |
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ଗଳନାଙ୍କ | 1337.33 K (1064.18 °C, 1947.52 °F) |
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ସ୍ଫୁଟନାଙ୍କ | 3129 K (2856 °C, 5173 °F) |
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Density near r.t. | 19.30 g/cm3 |
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when liquid, at m.p. | 17.31 g/cm3 |
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Heat of fusion | 12.55 kJ/mol |
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Heat of | 324 kJ/mol |
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Molar heat capacity | 25.418 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
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1 k
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10 k
|
100 k
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at T (K)
|
1646
|
1814
|
2021
|
2281
|
2620
|
3078
| |
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Oxidation states | 5, 4, 3, 2, 1, −1, −2 (amphoteric oxide) |
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Electronegativity | Pauling scale: 2.54 |
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Atomic radius | empirical: 144 pm |
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Covalent radius | 136±6 pm |
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Van der Waals radius | 166 pm |
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Crystal structure | lattice face centered cubic |
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Speed of sound thin rod | 2030 m/s (at r.t.) |
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Thermal expansion | 14.2 µm/(m·K) (at 25 °C) |
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Thermal conductivity | 318 W/(m·K) |
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Electrical resistivity | 22.14 n Ω·m (at 20 °C) |
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Magnetic ordering | diamagnetic[୧] |
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Young's modulus | 79 GPa |
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Shear modulus | 27 GPa |
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Bulk modulus | 180 GPa |
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Poisson ratio | 0.44 |
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Mohs hardness | 2.5 |
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Vickers hardness | 216 MPa |
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Brinell hardness | 25 HB MPa |
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CAS Number | 7440-57-5 |
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ଆବିଷ୍କାର | Middle Easterns (before 6000 BC) |
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| references |