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[理學(xué)]c3-group1-alkali-metals-在線瀏覽

2025-03-08 14:39本頁(yè)面
  

【正文】 NaCl) carnallite (KCl6H2O) 光鹵石n Li, Rb, Cs: various silicate minerals, . spodumene (LiAlSi2O6) 鋰輝石Extraction of sodium – Downs processExtraction of potassium Na(l) + KCl(l) ? K( g) + NaCl(l)n At 850 186。Cn Na . 890 186。 radicalO2+ Dioxygenyl cation 1905 radicalO2 oxygen 2 1580 biradicalO2 Superoxidedioxide(1) 1097 radicalO22 PeroxideDioxide(2)1 802 noMolecular orbital energy level diagram of O22Why alkali metals form different oxides? – A thermodynamic viewpointWhy do alkali metals form different oxides? Li2O () Na2O2 (NaO) KO2n The large alkali metal cations stabilize large lowcharge anions.n The less polarizing cations (those with low charge density) stabilize larger polarizable anions.n Vice versa. The atypical property of lithiumLi Na K Rb Csχp EI1 (kJ/mol)520 496 419 403 376E186。C . (Na) = 186。 △ Hhydration = 519 kJ L1) Solvated electrons1. Has better electric conductivity than ionic pounds in water.2. Less dense t
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