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ID number:900786
 
Author:
Evaluation:
Published: 19.04.2009.
Language: Latvian
Level: Secondary school
Literature: 3 units
References: Not used
Extract

Oglekļa vieta periodiskajā tabulā un tā atomu uzbūve
Ogleklis periodiskajā tabulā atrodas 2. periodā un 7. A grupā.
Oglekli apzīmē ar simbolu C un tā atomnumurs ir 6. Relatīvā atommasa 12,011.
Tā oksidēšanās pakāpe ir +4 vai -4.
Oglekļa alotropiskie veidi
Ogleklim ir divas stabilas
alotropiskās formas: grafīts un
dimants, bet ir pazīstama arī trešā –
karbīns. Amorfais ogleklis jeb ogle
ir grafīta paveids. Grafītu un
dimantu iegūst no iegulām dabā, kā
arī mākslīgi.
Dimants
Dimants ir viena no viscietākajām
vielām pasaulē.
Dimants ir ļoti ciets minerāls.
Tas ir caurspīdīgs un bezkrāsains.
Nevada elektrisko strāvu.…

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