Tantalum

73
Ta
Kumpulan
5
Kala
6
Blok
d
Proton
Elektron
Neutron
73
73
108
Ciri-Ciri Am
Nombor atom
73
Berat atom
180.94788
Nombor jisim
181
Kategori
Logam peralihan
Warna
Kelabu
Radioaktif
Tidak
Named after Tantalos, a Greek mythological character, father of Niobe
Struktur hablur
Pusat Badan Kubik
Sejarah
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.
Bilangan elektron per petala
2, 8, 18, 32, 11, 2
Konfigurasi elektron
[Xe] 4f14 5d3 6s2
Ta
Tantalum occurs principally in the mineral columbite-tantalite
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
16.654 g/cm3
Takat lebur
3290.15 K | 3017 °C | 5462.6 °F
Takat didih
5731.15 K | 5458 °C | 9856.4 °F
Haba pelakuran
36 kJ/mol
Haba pengewapan
735 kJ/mol
Muatan haba molar
0.14 J/g·K
Banyak pada kerak bumi
0.00017%
Banyak pada alam semesta
8×10-9%
Tantalum
Kredit imej: Images-of-elements
Tantalum pieces
Nombor CAS
7440-25-7
PubChem CID Number
23956
Ciri-Ciri Atom
Jejari atom
146 pm
Jejari kovalen
170 pm
Keelektronegatifan
1.5 (Skala Pauling)
Kebolehan mengion
7.5496 eV
Isipadu atom
10.90 cm3/mol
Daya pengaliran terma
0.575 W/cm·K
Keadaan pengoksidaan
-1, 2, 3, 4, 5
Aplikasi
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.
Tantalum is considered to be non-toxic
Isotop
Isotop stabil
181Ta
Isotop tidak stabil
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