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