Terbij

65
Tb
Skupina
n/a
Perioda
6
Blok
f
Protons
Electrons
Neutrons
65
65
94
General Properties
Vrstno število
65
Atomska teža
158,92535
Mass Number
159
Kategorija
Lantanoidi
Barva
Silver
Radioactive
Ne
Terbium was named after Ytterby, a town in Sweden
Kristalna struktura
Heksagonalna
Zgodovina
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
Razporeditev elektronov
[Xe] 4f9 6s2
Tb
Terbium is soft enough to be cut with a knife
Physical Properties
Faza snovi
Trdnina
Gostota
8,229 g/cm3
Tališče
1629,15 K | 1356 °C | 2472,8 °F
Vrelišče
3503,15 K | 3230 °C | 5846 °F
Talilna toplota
10,8 kJ/mol
Izparilna toplota
295 kJ/mol
Toplotna kapaciteta
0,182 J/g·K
Abundance in Earth's crust
0,000093%
Abundance in Universe
5×10-8%
Pure
Zasluge za slike: Images-of-elements
Pure terbium
CAS Number
7440-27-9
PubChem CID Number
23958
Atomic Properties
Atomski polmer
177 pm
Kovalentni polmer
194 pm
Elektronegativnost
1,2 (Paulingova lestvica)
Ionization Potential
5,8638 eV
Atomic Volume
19,20 cm3/mol
Toplotna prevodnost
0,111 W/cm·K
Oksidacijska stanja
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