Ang terbyo (Iningles terbium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Tb ug kaiphan nga atomik 65. Ang terbyo mao ang puthaw nga lantanido.
Quick Facts Terbium, Panagway ...
| Terbium |
|---|
65Tb |
|
|
| Panagway |
silvery white
 |
| Kinatibuk-ang mga kinaiya |
| Ngalan, simbolo, kaiphan |
terbium, Tb, 65 |
| Paglitok |
[[Help:Pronunciation respelling key|Plantilya:Smallcaps all-bee-əm]] |
| Kategoriyang elemento |
puthaw nga lantanido |
| Group, period, block |
[[group {{{group}}} element|{{{group}}}]], 6, f |
| Gibug-aton sa atomo |
158.92535 |
| Kontorno sa elektron |
[Xe] 4f9 6s2
2, 8, 18, 27, 8, 2
 Electron shells of terbium (2, 8, 18, 27, 8, 2) |
| History |
| Pagkadiskobre |
Carl Gustaf Mosander (1842) |
| First isolation |
Carl Gustaf Mosander (1842) |
| Physical properties |
| Phase |
magahi |
| Density (near r.t.) |
8.23 g·cm−3 |
| Liquid density at m.p. |
7.65 g·cm−3 |
| Melting point |
1629 K, 1356 °C, 2473 °F |
| Boiling point |
3503 K, 3230 °C, 5846 °F |
| Heat of fusion |
10.15 kJ·mol−1 |
| Heat of vaporization |
293 kJ·mol−1 |
| Molar heat capacity |
28.91 J·mol−1·K−1 |
| Vapor pressure |
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
1789 |
1979 |
(2201) |
(2505) |
(2913) |
(3491) |
|
| Atomic properties |
| Oxidation states |
4, 3, 2, 1
(weakly basic oxide) |
| Electronegativity |
? 1.2 (Pauling scale) |
| Ionization energies |
1st: 565.8 kJ·mol−1 |
| 2nd: 1110 kJ·mol−1 |
| 3rd: 2114 kJ·mol−1 |
| Atomic radius |
177 pm |
| Covalent radius |
194±5 pm |
| Miscellanea |
| Crystal structure |
hexagonal
|
| Magnetic ordering |
paramagnetic at 300 K |
| Electrical resistivity |
(r.t.) (α, poly) 1.150 µΩ·m |
| Thermal conductivity |
11.1 W·m−1·K−1 |
| Thermal expansion |
(r.t.) (α, poly) 10.3 µm/(m·K) |
| Speed of sound (thin rod) |
(20 °C) 2620 m·s−1 |
| 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 registry number |
7440-27-9 |
| Most stable isotopes |
| Main article: Isotopes of terbium |
| iso |
NA |
half-life |
DM |
DE (MeV) |
DP |
|---|
| 157Tb |
syn |
71 y |
ε |
0.060 |
157Gd |
| 158Tb |
syn |
180 y |
ε |
1.220 |
158Gd |
| β− |
0.937 |
158Dy |
| 159Tb |
100% |
159Tb is stable with 94 neutrons |
|
| · r |
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