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ID number:935482
 
Author:
Evaluation:
Published: 21.11.2007.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Extract

3.Agrupas elementi[B,al,ga,in,tl]1.vispārējais raksturojums *no B uz Tl met. Īp. Pieaug. Stiprākās ir tallijam. * B-neMe, al un ga[ox un hidrox] piemīt amfotēras īp.[reaģē gan ar skābēm gan bāzēm]. Amf.ox uzrāda skābo un bāz. Ox īp. *grupā pieaugot kārtas skaitlim palielinās Me īp., blīvums, kušanas temp,cietība. *B,Al,ga,in=+3; tl=+1[visbiežāk]/+3 *al ir visnozīmīgākais no 3.A grupas. *visi ir p elementi, beidzas p laukos[2p,3p, utt].…

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