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ନାମ, ପ୍ରତୀକ | terbium, Tb |
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Appearance | silvery white |
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ଉଚ୍ଚାରଣ | TUR-bee-əm |
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ପରମାଣୁ କ୍ରମାଙ୍କ (Z) | 65 |
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ଶ୍ରେଣୀ, ବ୍ଳକ | group n/a, f-block |
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ପର୍ଯ୍ୟାୟ | period 6 |
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ମୌଳିକ ପ୍ରକାର | lanthanide |
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ମାନକ ପରମାଣବିକ ଓଜନ (Ar) | 158.92535 |
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ଇଲେକ୍ଟ୍ରୋନ୍ ବିନ୍ୟାସ | [Xe] 4f9 6s2 |
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per shell | 2, 8, 18, 27, 8, 2 |
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ଅବସ୍ଥା | solid |
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ଗଳନାଙ୍କ | 1629 K (1356 °C, 2473 °F) |
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ସ୍ଫୁଟନାଙ୍କ | 3503 K (3230 °C, 5846 °F) |
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Density near r.t. | 8.23 g/cm3 |
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when liquid, at m.p. | 7.65 g/cm3 |
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Heat of fusion | 10.15 kJ/mol |
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Heat of | 293 kJ/mol |
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Molar heat capacity | 28.91 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
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1 k
|
10 k
|
100 k
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at T (K)
|
1789
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1979
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(2201)
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(2505)
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(2913)
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(3491)
| |
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Oxidation states | 4, 3, 2, 1 (weakly basic oxide) |
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Electronegativity | Pauling scale: ? 1.2 |
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Atomic radius | empirical: 177 pm |
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Covalent radius | 194±5 pm |
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Crystal structure | hexagonal close-packed (hcp) |
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Speed of sound thin rod | 2620 m/s (at 20 °C) |
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Thermal expansion | (r.t.) (α, poly) 10.3 µm/(m·K) |
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Thermal conductivity | 11.1 W/(m·K) |
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Electrical resistivity | (r.t.) (α, poly) 1.150 µ Ω·m |
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Magnetic ordering | paramagnetic at 300 K |
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Young's modulus | (α form) 55.7 GPa |
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Shear modulus | (α form) 22.1 GPa |
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Bulk modulus | (α form) 38.7 GPa |
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Poisson ratio | (α form) 0.261 |
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Vickers hardness | 863 MPa |
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Brinell hardness | 677 MPa |
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CAS Number | 7440-27-9 |
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ଆବିଷ୍କାର | Carl Gustaf Mosander (1842) |
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First isolation | Carl Gustaf Mosander (1842) |
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| references |