Tantalium
73
Ta
Groep
5
Periode
6
Blok
d
Protrone
Elektrone
Neutrone
73
73
108
Algemene Eienskappe
Atoom Nommer
73
Atoommassa
180,94788
Massa Nommer
181
Kategorie
Oorgangsmetale
Kleur
Grys
Radioaktief
Nee
Named after Tantalos, a Greek mythological character, father of Niobe
Kristalstruktuur
Ligaamsgesentreerde kubieke
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 32, 11, 2
Elektronkonfigurasie
[Xe] 4f14 5d3 6s2
Tantalum occurs principally in the mineral columbite-tantalite
Fisiese Eienskappe
Fase
Soliede
Digtheid
16,654 g/cm3
Smeltpunt
3290,15 K | 3017 °C | 5462,6 °F
Kookpunt
5731,15 K | 5458 °C | 9856,4 °F
Heat of Fusion
36 kJ/mol
Heat of Vaporization
735 kJ/mol
Spesifieke Hitte Kapasiteit
0,14 J/g·K
Oorvloed in die aardkors
0,00017%
Oorvloed in die heelal
8×10-9%
CAS Nommer
7440-25-7
PubChem CID Nommer
23956
Atomiese Eienskappe
Atoom radius
146 pm
Kovalente Radius
170 pm
Elektronegatiewiteit
1,5 (Pauling scale)
Ionisasie potensiaal
7,5496 eV
Atoom volume
10,90 cm3/mol
Termiese geleidingsvermoë
0,575 W/cm·K
Oksidasiestate
-1, 2, 3, 4, 5
Toepassings
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
Isotope
Stabiele Isotope
181TaOnstabiele Isotope
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