 |
|
| ନାମ, ପ୍ରତୀକ | holmium, Ho |
|---|
| Appearance | silvery white |
|---|
| ଉଚ୍ଚାରଣ | HOHL-mee-əm |
|---|
|
|
|
| ପରମାଣୁ କ୍ରମାଙ୍କ (Z) | 67 |
|---|
| ଶ୍ରେଣୀ, ବ୍ଳକ | group n/a, f-block |
|---|
| ପର୍ଯ୍ୟାୟ | period 6 |
|---|
| ମୌଳିକ ପ୍ରକାର | lanthanide |
|---|
| ମାନକ ପରମାଣବିକ ଓଜନ (Ar) | 164.93032 |
|---|
| ଇଲେକ୍ଟ୍ରୋନ୍ ବିନ୍ୟାସ | [Xe] 4f11 6s2 |
|---|
per shell | 2, 8, 18, 29, 8, 2 |
|---|
|
| ଅବସ୍ଥା | solid |
|---|
| ଗଳନାଙ୍କ | 1734 K (1461 °C, 2662 °F) |
|---|
| ସ୍ଫୁଟନାଙ୍କ | 2993 K (2720 °C, 4928 °F) |
|---|
| Density near r.t. | 8.79 g/cm3 |
|---|
| when liquid, at m.p. | 8.34 g/cm3 |
|---|
| Heat of fusion | 17.0 kJ/mol |
|---|
| Heat of | 265 kJ/mol |
|---|
| Molar heat capacity | 27.15 J/(mol·K) |
|---|
pressure
| P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
| at T (K)
|
1432
|
1584
|
(1775)
|
(2040)
|
(2410)
|
(2964)
| |
|
| Oxidation states | 3, 2, 1
(basic oxide) |
|---|
| Electronegativity | Pauling scale: 1.23 |
|---|
| Atomic radius | empirical: 176 pm |
|---|
| Covalent radius | 192±7 pm |
|---|
|
| Crystal structure | hexagonal close-packed (hcp) |
|---|
| Speed of sound thin rod | 2760 m/s (at 20 °C) |
|---|
| Thermal expansion | (r.t.) (poly) 11.2 µm/(m·K) |
|---|
| Thermal conductivity | 16.2 W/(m·K) |
|---|
| Electrical resistivity | (r.t.) (poly) 814 n Ω·m |
|---|
| Magnetic ordering | paramagnetic |
|---|
| Young's modulus | 64.8 GPa |
|---|
| Shear modulus | 26.3 GPa |
|---|
| Bulk modulus | 40.2 GPa |
|---|
| Poisson ratio | 0.231 |
|---|
| Vickers hardness | 481 MPa |
|---|
| Brinell hardness | 746 MPa |
|---|
| CAS Number | 7440-60-0 |
|---|
|
| ଆବିଷ୍କାର | Marc Delafontaine (1878) |
|---|
|
|
|
| | references |
