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ID number:956290
 
Author:
Evaluation:
Published: 07.12.2006.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Halogēni:
periodiskās tabulas 7 grupas elementi.
tie visi ir aktīvi nemetāli.
fluors, hlors, broms un jods. Dažreiz pie halogēniem pieskaita arī astatu.
fluors un hlors ir gāzes,
broms ir šķidrums un jods (un astats) ir cietas vielas.
Uzbūve:
halogēni brīvā veidā veido divatomu molekulas.…

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