Eegenskapen |
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Algemian |
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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] |
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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 [2] |
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Tustant | fääst |
Kristal | kuubisk |
Sachthaid | 6,773 g/cm3 (25 °C)[4] |
Hardhaid | 2,5 |
Magnetismus | paramagneetisk (Χm = 1,4 · 10−3)[5] |
Smoltponkt | 1068 K (795 °C) |
Köögponkt | 3743 K[6] K (3470 °C) |
Molaar Rüm | 20,69 · 10−6 m3/mol |
Dampwaremk | 398 kJ/mol[6] 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 [2] |
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Oksidatsionstustant | 3, 4 |
Sür of baasisk | lacht baasisk |
Normoolpotentiaal | −2,34 V (Ce3+ + 3 e− → Ce) |
Elektronegatiwiteet | 1,12 (Pauling-Skala) |
Isotoopen |
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Isotoop | NH | t1/2 | Aktiwiteet | Energii (MeV) | Produkt |
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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 |
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Muar isotoopen bi List faan isotoopen |
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Seekerhaid |
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Miast wurd SI-ianhaiden brükt. |
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.
Bilen
Rian Tseerium
Cer(III)-kloriid
Cer(IV)-sulfaat
Ammoniumcer(IV)-nitraat
Luke uk diar
Kwelen