# Sezyûm

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|  |
| --- |
| Ksenon ← **Sezyûm** → Baryûm
 |
| Rb ↑ **Cs** ↓ Fr
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**55Cs**
Sîstema vedorî ya elementan |

 |

 |
| **Şeklê wê** |
|  |
| **Bi tevayî** |
| Nav, direfş, nimre
 | Sezyûm, Cs, 55
 |
| Kom, vedor, blok
 | 1, 6, s
 |
| Cure
 | Lajwerdên alkalî
 |
| Tîrbûn
 | 2,7 g/cm3 (25 °C)
 |
| **Agahî** |
| Giraniya atomê
 | 132,9054 u
 |
| Nîveşkêla atomê
 | 265 (298) pm
 |
| Nîveşkêla kovalansê
 | 244 pm
 |
| Nîveşkêla Van der Waalsê
 | 343 pm
 |
| Rêzbûna elektronan
 | [Xe] 6s1 |
| Rewşa di germiya odê de
 | Hişk
 |
| Xala helînê
 | 301,59 K (28,44 °C)
 |
| Xala kelînê
 | 944 K (671 °C)
 |
| Kabikê molî
 | 70,94 · 10-6 m3/mol
 |
| Derenceya bilindbûnê
 | 1, 2, **3** |
| Oksîdên xwe
 | Cs2O3 |
| Elektronegatîfî
 | 0,79 (Pauling-Skala)
 |
| **Îzotop** |
|

| Îzo
 | LC
 | t1/2 | ÇA
 | EX MeV
 | ENû
 |
| --- | --- | --- | --- | --- | --- |
| 131Cs |
{syn.}

 |  9,689 r  | ε | 0,352 | 131Xe |
| 132Cs |
6,479 %

 |  6,479 r  | ε | 2,120 | 132Xe |
| β- | 1,280 | 132Ba |
| 133Cs | **100** %

 |  Qayîm |
| 134Cs |
{syn.}

 |  2,0648 sal  | β- | 2,059 | 134Ba |
| 135Cs |
{syn.}

 |  2,3 · 106 sal  | β- | 0,2 | 135Ba |
| 136Cs |
{syn.}

 |  13,16 r  | β- | 2,548 | 136Ba |
| 137Cs |
{syn.}

 |  30,17 sal  | β- | 1,176 | 137Ba |

 |
| **Tevdîr girtin** |
| **Nîşanên xeterê** |
|

|  |  |
| --- | --- |
|  |  |
| Ev tişt zû dişewite
 | Ev tişt diherfîne
 |
| (F)
 | (C)
 |

 |

**Sezyûm** (bi latînî: caesium, ji bi latînî: caesius "şîn") metalek û elementek e.