Тербиум

65
Tb
Група
Нема одговор
Периода
6
блок
f
Protons
Electrons
Neutrons
65
65
94
Општи Својства
Атомски број
65
Атомска тежина
158,92535
Mass Number
159
Category
Ланта­ноид
Color
Silver
Radioactive
Не
Terbium was named after Ytterby, a town in Sweden
Кристална структура
Simple Hexagonal
History
Terbium was discovered in 1843 by Swedish chemist Carl Gustaf Mosander, who detected it as an impurity in yttria.

Using ammonium hydroxide he precipitated fractions of different basicity from yttria.

In these fractions he found that the fraction that was essentially colorless in solution, but gave a brown-tinged oxide was terbium.
Electrons per shell
2, 8, 18, 27, 8, 2
Електронска конфигурација
[Xe] 4f9 6s2
Tb
Terbium is soft enough to be cut with a knife
Физички Својства
Фаза
Solid
Густина
8,229 g/cm3
Точка на топење
1629,15 K | 1356 °C | 2472,8 °F
Точка на вриење
3503,15 K | 3230 °C | 5846 °F
Топлина на топење
10,8 kJ/mol
Топлина на испарување
295 kJ/mol
Specific Heat Capacity
0,182 J/g·K
Abundance in Earth's crust
0,000093%
Abundance in Universe
5×10-8%
Pure
Кредити на слика: Images-of-elements
Pure terbium
CAS Number
7440-27-9
PubChem CID Number
23958
Атомски Својства
Атомски полупречник
177 pm
Ковалентен полупречник
194 pm
Електронегативност
1,2 (Полингова скала)
Ionization Potential
5,8638 eV
Atomic Volume
19,20 cm3/mol
Thermal Conductivity
0,111 W/cm·K
Oxidation States
1, 3, 4
Applications
Terbium is used in alloys and in the production of electronic devices.

It is also used as a dopant for materials in solid-state devices and optical fibers.

Terbium oxide is in fluorescent lamps and TV tubes.

The brilliant fluorescence allows terbium to be used as a probe in biochemistry.
Terbium is considered to be moderately toxic
Isotopes
Stable Isotopes
159Tb
Unstable Isotopes
136Tb, 137Tb, 138Tb, 139Tb, 140Tb, 141Tb, 142Tb, 143Tb, 144Tb, 145Tb, 146Tb, 147Tb, 148Tb, 149Tb, 150Tb, 151Tb, 152Tb, 153Tb, 154Tb, 155Tb, 156Tb, 157Tb, 158Tb, 160Tb, 161Tb, 162Tb, 163Tb, 164Tb, 165Tb, 166Tb, 167Tb, 168Tb, 169Tb, 170Tb, 171Tb