Tseerium (uk Cerium of Cer) as en cheemisk element mä det ufkörtang Ce an det atoomnumer 58. Hat hiart tu a lantaniiden an diarmä tu a raar eerden.
Weitere Informationen Eegenskapen, Algemian ...
| Eegenskapen |
|
|
| Algemian |
| Nööm, Symbool, Numer |
Tseerium, Ce, 58 |
| Seerie |
Lantanoid |
| Skööl, Periode, Blook |
La, 6, f |
| Klöör, Skak |
salwern witj |
| CAS-Numer |
7440-45-1 |
| Uundial |
43 ppm[1] |
| Atomaar [2] |
| Atoommase |
140,116(1)[3] u |
| Atoomraadius (bereegent) |
185 () pm |
| Kovalent-Raadius |
204 pm |
| Elektroonen |
[Xe] 4f1 5d1 6s2 |
| 1. Ionisiarang |
534,4 kJ/mol |
| 2. Ionisiarang |
1050 kJ/mol |
| 3. Ionisiarang |
1949 kJ/mol |
| 4. Ionisiarang |
3547 kJ/mol |
| Füsikaalisk [4] |
| Tustant |
fääst |
| Kristal |
kuubisk |
| Sachthaid |
6,773 g/cm3 (25 °C)[5] |
| Hardhaid |
2,5 |
| Magnetismus |
paramagneetisk (Χm = 1,4 · 10−3)[6] |
| Smoltponkt |
1068 K (795 °C) |
| Köögponkt |
3743 K[7] K (3470 °C) |
| Molaar Rüm |
20,69 · 10−6 m3/mol |
| Dampwaremk |
398 kJ/mol[7] kJ/mol |
| Smoltwaremk |
5,5 kJ/mol |
| Faard faan a tuun |
2100 m/s bi 293,15 K |
| Elektrisk struumfeerang |
1,35 · 106 A/(V · m) |
| Waremkfeerang |
11 W/(m · K) |
| Cheemisk [8] |
| Oksidatsionstustant |
3, 4 |
| Sür of baasisk |
lacht baasisk |
| Normoolpotentiaal |
−2,34 V (Ce3+ + 3 e− → Ce) |
| Elektronegatiwiteet |
1,12 (Pauling-Skala) |
| Isotoopen |
| Isotoop |
NH |
t1/2 |
Aktiwiteet |
Energii (MeV) |
Produkt |
| 134Ce |
{syn.}
| 3,16 d | ε | 0,500 | 134La |
| 135Ce |
{syn.}
| 17,7 h | ε | 2,026 | 135La |
| 136Ce |
0,19 %
|
stabiil |
| 137Ce |
{syn.}
| 9,0 h | ε | 1,222 | 137La |
| 138Ce |
0,25 %
|
stabiil |
| 139Ce |
{syn.}
| 137,64 d | ε | 0,581 | 139La |
| 140Ce |
88,48 %
|
stabiil |
| 141Ce |
{syn.}
| 32,501 d | β− | 0,581 | 141Pr |
| 142Ce |
11,08 %
| 5 · 1016 a | β−β− | 4,505 | 142Nd |
| 143Ce |
{syn.}
| 33,039 h | β− | 1,462 | 143Pr |
| 144Ce |
{syn.}
| 284,893 d | β− | 0,319 | 144Pr |
|
| Muar isotoopen bi List faan isotoopen |
| Seekerhaid |
|
|
| Miast wurd SI-ianhaiden brükt. |
Schließen
Tekst üüb Öömrang
Rian Tseerium
SIMS-Spektrum faan Cer
Cer(III)-kloriid
Cer(IV)-sulfaat
Ammoniumcer(IV)-nitraat
-sulfat-2.JPG)
