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ID number:763991
 
Author:
Evaluation:
Published: 07.12.2008.
Language: Latvian
Level: Elementary school
Literature: 11 units
References: Not used
Extract

Fizikālās īpašības.
Ciets;

Sudrabbalts ar sārtu atspīdumu;

Feromagnētisks;
Ķīmiskās īpašības.

Līdzīgs dzelzij, bet mazāk aktīvs;

Sakarsēts līdz 300oC, kobalts gaisā sāk oksidēties:
3Co + 2O2 → Co3O4

Ķīmiskās īpašības.
Paaugstinātā t0 Co reaģē ar visiem nemetāliem (izņemot N2 un H2) parasti ar vērtību (II).

Reaģē ar atšķaidītu skābju šķīdumiem, veidojot kobalta (II) sāļus:
Co + 2HCL → CoCl2 + H2↑.…

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