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ID number:968044
 
Author:
Evaluation:
Published: 02.02.2011.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Extract

Krāsainie metāli dabā sastopami gan sakausējumu, gan brīvā veidā.
Visu krāsaino metālu iegušanas paņēmienu pamatā ir reducēšanās process
piemēram: Uz metālisko elementu oksīdu rūdām vai sāļiem iedarbojoties ar dažādiem reducētājiem, ar ogli, vai ogekļa dioksīdu, ar alumīniju, ar ūdeņradi, vai ar
līdzstrāvu.

Krāsaino metālu kušanas temperatūra
Litijs-180,5
Kālijs-63,3
Nātrijs-97,8
Kalcijs-839
Magnijs-648,8
Alumīnijs-660,4
Titāns-1660
Cinks-419,6
Hroms-1857
Alva-232
Niķelis-1453
Varš-1083,4
Dzīvsudrabs- -38,9
Volfrāms-3410
Osmijs-3045 …

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