Terbium

65
Tb
Golongan
n/a
Periode
6
Blok
f
Proton
Elektron
Neutron
65
65
94
Sifat Umum
Nomor atom
65
Massa atom
158,92535
Nomor massa
159
Kategori
Lantanida
Warna
Perak
Radioaktif
Tidak
Terbium was named after Ytterby, a town in Sweden
Struktur kristal
Segienam Sederhana
Sejarah
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.
Elektron per kulit
2, 8, 18, 27, 8, 2
Konfigurasi elektron
[Xe] 4f9 6s2
Tb
Terbium is soft enough to be cut with a knife
Sifat Fisika
Fase
Solid
Kepadatan
8,229 g/cm3
Titik lebur
1629,15 K | 1356 °C | 2472,8 °F
Titik didih
3503,15 K | 3230 °C | 5846 °F
Kalor peleburan
10,8 kJ/mol
Kalor penguapan
295 kJ/mol
Kapasitas kalor molar
0,182 J/g·K
Kelimpahan di kerak bumi
0,000093%
Kelimpahan di alam semesta
5×10-8%
Pure
Kredit Gambar: Images-of-elements
Pure terbium
Nomor CAS
7440-27-9
PubChem CID Number
23958
Sifat Atom
Jari-jari atom
177 pm
Jari-jari kovalen
194 pm
Elektronegativitas
1,2 (Skala Pauling)
Potensi Ionisasi
5,8638 eV
Volume atom
19,20 cm3/mol
Kondusivitas termal
0,111 W/cm·K
Bilangan oksidasi
1, 3, 4
Aplikasi
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
Isotop
Isotop stabil
159Tb
Isotop tidak stabil
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