Eegenskapen
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Algemian
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Nööm, Symbool, Numer
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Tseerium, Ce, 58
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Seerie
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Lantanoid
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Skööl, Periode, Blook
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La, 6, f
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Klöör, Skak
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salwern witj
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CAS-Numer
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7440-45-1
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Uundial
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43 ppm[1] |
Atomaar [2] |
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Atoommase
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140,116(1)[3] u
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Atoomraadius (bereegent)
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185 () pm
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Kovalent-Raadius
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204 pm
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Elektroonen
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[Xe] 4f1 5d1 6s2 |
1. Ionisiarang
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534,4 kJ/mol
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2. Ionisiarang
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1050 kJ/mol
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3. Ionisiarang
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1949 kJ/mol
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4. Ionisiarang
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3547 kJ/mol
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Füsikaalisk [2] |
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Tustant
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fääst
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Kristal
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kuubisk
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Sachthaid
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6,773 g/cm3 (25 °C)[4] |
Hardhaid
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2,5
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Magnetismus
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paramagneetisk (Χm = 1,4 · 10−3)[5] |
Smoltponkt
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1068 K (795 °C)
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Köögponkt
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3743 K[6] K (3470 °C)
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Molaar Rüm
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20,69 · 10−6 m3/mol
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Dampwaremk
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398 kJ/mol[6] kJ/mol
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Smoltwaremk
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5,5 kJ/mol
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Faard faan a tuun
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2100 m/s bi 293,15 K
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Elektrisk struumfeerang
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1,35 · 106 A/(V · m)
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Waremkfeerang
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11 W/(m · K)
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Cheemisk [2] |
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Oksidatsionstustant
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3, 4
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Sür of baasisk
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lacht baasisk
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Normoolpotentiaal
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−2,34 V (Ce3+ + 3 e− → Ce)
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Elektronegatiwiteet
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1,12 (Pauling-Skala)
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Isotoopen
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Isotoop
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NH
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t1/2
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Aktiwiteet
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Energii (MeV)
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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 %
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stabiil | 137Ce |
{syn.}
| 9,0 h | ε | 1,222 | 137La | 138Ce |
0,25 %
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stabiil | 139Ce |
{syn.}
| 137,64 d | ε | 0,581 | 139La | 140Ce |
88,48 %
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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.
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