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Chemistry

 Nemetāli
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ID number:265567
 
Author:
Evaluation:
Published: 05.11.2007.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Extract

Nemetālu atrašānās dabā. Nemetāli dabā sastopami:
a)brīvā veidā kā vienkāršas vielas. Vienkāršu vielu dabā ir attiecīgo ķīmisko elementu. Tas ir tāpēc, ka viens ķīmiskais elements spēj veidot vairākas vienkāršas vielas, un šo parādību sauc par alotropiju. Bet pašas vienkāršas vielas par elementa alotropiskajiem veidiem.
Piemēri: O – dabā O2 (skābeklis) , O3 (ozons). …

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