Eegenskapen
|
|
Algemian
|
Nööm, Symbool, Numer
|
Tantaal, Ta, 73
|
Seerie
|
Auergungsmetal
|
Skööl, Periode, Blook
|
5, 6, d
|
Klöör, Skak
|
grä
|
CAS-Numer
|
7440-25-7
|
Uundial
|
8 ppm[1]
|
Atomaar [2]
|
Atoommase
|
180,94788(2)[3] u
|
Atoomraadius (bereegent)
|
145 (200) pm
|
Kovalent-Raadius
|
138 pm
|
Elektroonen
|
[Xe] 4f14 5d3 6s2
|
1. Ionisiarang
|
761 kJ/mol
|
2. Ionisiarang
|
1500 kJ/mol
|
Füsikaalisk [2]
|
Tustant
|
fääst
|
Kristal
|
kuubisk
|
Sachthaid
|
16,65 g/cm3 (20 °C)[4]
|
Hardhaid
|
6,5
|
Magnetismus
|
paramagneetisk (Χm = 1,8 · 10−4)[5]
|
Smoltponkt
|
3290 K (3017 °C)
|
Köögponkt
|
5693 K[6] K (5420 °C)
|
Molaar Rüm
|
10,85 · 10−6 m3/mol
|
Dampwaremk
|
753 kJ/mol[6] kJ/mol
|
Smoltwaremk
|
36 kJ/mol
|
Faard faan a tuun
|
3400 m/s bi 293,15 K
|
Waremk
|
140 J/(kg · K)
|
Elektrisk struumfeerang
|
7,61 · 106 A/(V · m)
|
Waremkfeerang
|
57 W/(m · K)
|
Cheemisk [2]
|
Oksidatsionstustant
|
5
|
Sür of baasisk
|
lacht sür
|
Normoolpotentiaal
|
−0,81 V (½ Ta2O5 + 5 H+ + 5 e− → Ta + 2½ H2O)
|
Elektronegatiwiteet
|
1,5 (Pauling-Skala)
|
Isotoopen
|
Isotoop
|
NH
|
t1/2
|
Aktiwiteet
|
Energii (MeV)
|
Produkt
| 177Ta |
{syn.}
| 56,56 h | ε | 1,166 | 177Hf |
178Ta |
{syn.}
| 2,36 h | ε | 1,910 | 178Hf |
179Ta |
{syn.}
| 1,82 a | ε | 0,110 | 179Hf |
180Ta |
{syn.}
| 8,125 h | ε | 0,854 | 180Hf | β− | 0,708 | 180W |
180mTa |
0,012 %
| >2 · 1016 a | ε | 0,929 | 180Hf | β− | 0,783 | 180W | IT | 0,075 | 180Ta |
181Ta |
99,988 %
|
stabiil |
182Ta |
{syn.}
| 114,43 d | β− | 1,814 | 182W |
183Ta |
{syn.}
| 5,1 d | β− | 1,070 | 183W |
|
Muar isotoopen bi List faan isotoopen
|
NMR-Eegenskapen
|
|
Seekerhaid
|
|
Muar wäärnangen
|
MAK-miat |
Schweiz: 5 mg·m−3 (stoof)[8]
|
Miast wurd SI-ianhaiden brükt.
|
Tantaal as en cheemisk element mä det ufkörtang Ta an det atoomnumer 73. Hat as en grä auergungsmetal. Tantaal woort uun a elektrotechnik an medesiintechnik iinsaat.
- ↑ Harry H. Binder: Lexikon der chemischen Elemente. S. Hirzel Verlag, Stuttgart 1999, ISBN 3-7776-0736-3.
- ↑ A taalen för't infobox kem miast faan www.webelements.com (Tantal) .
- ↑ CIAAW, Standard Atomic Weights Revised 2013.
- ↑ N. N. Greenwood, A. Earnshaw: Chemie der Elemente. 1. aplaag. VCH, Weinheim 1988, ISBN 3-527-26169-9, S. 1260.
- ↑ Robert C. Weast (Hrsg.): CRC Handbook of Chemistry and Physics. CRC (Chemical Rubber Publishing Company), Boca Raton 1990, ISBN 0-8493-0470-9, S. E-129 bit E-145. Wäärser diar uun g/mol an uun cgs-ianhaiden. Heer amreegent tu SI-wäärs.
- ↑ 6,0 6,1 Yiming Zhang, Julian R. G. Evans, Shoufeng Yang: Corrected Values for Boiling Points and Enthalpies of Vaporization of Elements in Handbooks. Uun: Journal of Chemical & Engineering Data. 56, 2011, S. 328–337, doi:10.1021/je1011086.
- ↑ 7,0 7,1 Iindraanj tu Tantal, Pulver uun't GESTIS-dootenbeenk faan't IFA, ufrepen di 30. April 2017 (mä JavaScript).
- ↑ Schweizerische Unfallversicherungsanstalt (SUVA): Aktuel MAK- an BAT-wäärser