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Caeisiam - Vicipéid

Caeisiam

Ón Vicipéid, an chiclipéid shaor.

Caeisiam
Siombail Cheimiceach Cs
Uimhir Adamhach 55
Meáchan Adamhach 132.9054519(2) g·mol
Grúpa, Peiriad 1, 6, s
Dlús 1.93 g·cm−3
Sraith Cheimiceach Miotail alcaileacha

Is é an caeisiam dúil uimhir a 55, agus is í an tsiombail cheimiceach atá aige ná Cs. Cosúil leis na miotail alcaileacha eile, is miotal é a bhfanann loinnir an airgid ghil ann a fhad is nach dtagann sé i dteagmháil le hocsaigin an aeir. Tá imoibriú an chaeisiam leis an uisce, arís, níos feiceálaí agus níos fíochmhaire ná an t-imoibriú céanna ag na miotail alcaileacha níos éadroime ná é - le fírinne, tá an caeisiam in ann an t-imoibriú seo a dhéanamh leis an oighear féin má tá an teocht níos airde ná -116°C.

Is minic a shíltear go bhfuil an caeisiam radaighníomhach, ó scaipeadh iseatóp radaighníomhach na dúile seo timpeall na hEorpa i ndiaidh thubaiste Chernobyl. Le fírinne, áfach, is é an t-aon iseatóp amháin atá ar fáil sa dúlra ná 133Cs, agus is iseatóp cobhsaí é. Na hiseatóip radaighníomhacha atá ag an gcaeisiam, ní mór iad a ghineadh go saorga. Scéal eile ar fad is ea é go bhfuil 134Cs ar ceann de na núiclídí is tábhachtaí leis an truailliú i dtimpeallacht na stáisiún adamhach cumhachta a thomhas.

Má chuirtear salann caeisiam trí thine, aithneofar an caeisiam ar an lasair ghorm. Sin é an tuige go dtugtar "caeisiam" ar an dúil seo, nó is focal Laidine é caesius a chiallaíonn "gealghorm" nó "spéirghorm".

Is í an ghnáthuimhir ocsaídiúcháin a bhíonn ag an gcaeisiam ina chuid comhdhúl ná +1, ar ndóigh. Tugann tuairiscí áirithe le fios, áfach, go bhfuil an fluairín inniúil ar an gcaeisiam a ocsaídiú go huimhreacha níos airde fós.

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aa - ab - af - ak - als - am - an - ang - ar - arc - as - ast - av - ay - az - ba - bar - bat_smg - bcl - be - be_x_old - bg - bh - bi - bm - bn - bo - bpy - br - bs - bug - bxr - ca - cbk_zam - cdo - ce - ceb - ch - cho - chr - chy - co - cr - crh - cs - csb - cu - cv - cy - da - de - diq - dsb - dv - dz - ee - el - eml - eo - es - et - eu - ext - fa - ff - fi - fiu_vro - fj - fo - fr - frp - fur - fy - ga - gan - gd - gl - glk - gn - got - gu - gv - ha - hak - haw - he - hi - hif - ho - hr - hsb - ht - hu - hy - hz - ia - id - ie - ig - ii - ik - ilo - io - is - it - iu - ja - jbo - jv - ka - kaa - kab - kg - ki - kj - kk - kl - km - kn - ko - kr - ks - ksh - ku - kv - kw - ky - la - lad - lb - lbe - lg - li - lij - lmo - ln - lo - lt - lv - map_bms - mdf - mg - mh - mi - mk - ml - mn - mo - mr - mt - mus - my - myv - mzn - na - nah - nap - nds - nds_nl - ne - new - ng - nl - nn - no - nov - nrm - nv - ny - oc - om - or - os - pa - pag - pam - pap - pdc - pi - pih - pl - pms - ps - pt - qu - quality - rm - rmy - rn - ro - roa_rup - roa_tara - ru - rw - sa - sah - sc - scn - sco - sd - se - sg - sh - si - simple - sk - sl - sm - sn - so - sr - srn - ss - st - stq - su - sv - sw - szl - ta - te - tet - tg - th - ti - tk - tl - tlh - tn - to - tpi - tr - ts - tt - tum - tw - ty - udm - ug - uk - ur - uz - ve - vec - vi - vls - vo - wa - war - wo - wuu - xal - xh - yi - yo - za - zea - zh - zh_classical - zh_min_nan - zh_yue - zu -

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