Tantalo
73
Ta
Grupo
5
Perio
6
Bloko
d
Protonoj
Elektronoj
Neŭtronoj
73
73
108
Ĝeneralaj Propraĵoj
Atoma Nombro
73
Atommaso
180,94788
Amasa Nombro
181
Kategorio
Transirmetaloj
Koloro
Griza
Radioaktiva
Ne
Named after Tantalos, a Greek mythological character, father of Niobe
Kristala Strukturo
Korpo Centrita Kubo
Historio
Tantalum was discovered in Sweden in 1802 by Anders Ekeberg in the minerals tantalite from Finland and yttrotantalite from Sweden.
Unfortunately, William Hyde Wollaston claimed Ekeberg's new element was actually niobium, which had also been discovered in 1802.
In 1846, German chemist Heinrich Rose finally proved beyond doubt that tantalum and niobium were different elements.
Unfortunately, William Hyde Wollaston claimed Ekeberg's new element was actually niobium, which had also been discovered in 1802.
In 1846, German chemist Heinrich Rose finally proved beyond doubt that tantalum and niobium were different elements.
Elektronoj per ŝelo
2, 8, 18, 32, 11, 2
Elektrona Agordo
[Xe] 4f14 5d3 6s2
Tantalum occurs principally in the mineral columbite-tantalite
Fizikaj Propraĵoj
Fazo
Solido
Denso
16,654 g/cm3
Fandpunkto
3290,15 K | 3017 °C | 5462,6 °F
Bolpunkto
5731,15 K | 5458 °C | 9856,4 °F
Varmo de Fuzio
36 kJ/mol
Varmo de Vaporiĝo
735 kJ/mol
Specifa Varmo Kapacito
0,14 J/g·K
Krusta Abundo
0,00017%
Universa Abundo
8×10-9%
CAS Nombro
7440-25-7
PubChem Kunmetita Identiga Nombro
23956
Atomaj Propraĵoj
Atoma Radiuso
146 pm
Kovalenta Radiuso
170 pm
Elektronegativeco
1,5 (Pauling-skalo)
Potencialo de jonigo
7,5496 eV
Atoma Volumo
10,90 cm3/mol
Termika Kondukto
0,575 W/cm·K
Oksidaj Ŝtatoj
-1, 2, 3, 4, 5
Aplikoj
Tantalum is used in the electronics industry for capacitors and high power resistors.
The high melting point and oxidation resistance lead to the use of the metal in the production of vacuum furnace parts.
Tantalum oxide is used to make special glass with high index of refraction for camera lenses.
The high melting point and oxidation resistance lead to the use of the metal in the production of vacuum furnace parts.
Tantalum oxide is used to make special glass with high index of refraction for camera lenses.
Tantalum is considered to be non-toxic
Izotopoj
Stabilaj Izotopoj
181TaMalstabilaj Isotopoj
155Ta, 156Ta, 157Ta, 158Ta, 159Ta, 160Ta, 161Ta, 162Ta, 163Ta, 164Ta, 165Ta, 166Ta, 167Ta, 168Ta, 169Ta, 170Ta, 171Ta, 172Ta, 173Ta, 174Ta, 175Ta, 176Ta, 177Ta, 178Ta, 179Ta, 180Ta, 182Ta, 183Ta, 184Ta, 185Ta, 186Ta, 187Ta, 188Ta, 189Ta, 190Ta