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ID number:295303
 
Author:
Evaluation:
Published: 10.12.2004.
Language: Latvian
Level: Secondary school
Literature: 2 units
References: Not used
Extract

Slāpeklis un tā nozīme tautsaimniecībā.

Slāpeklis (N) –bezkrāsaina gāze bez smakas. Atklāts 1772. gadā. Ķīmiski maz aktīvs, no metāliem savienojas tikai ar litiju (Li). Ar ūdeņradi (H) – veido amonjaku (NH3), ar skābekli (O) – oksīdus (NO3), ar metāliem – nitrīdus.
Slāpeklis slikti šķīst ūdenī (H2O), neveicina degšanu, elpošanu (slāpē). Gaisā pēc svara ir apmēram 75% N. Slāpeklis galvenokārt ietilpst organiskajos savienojumos, kas ar mikroorganismu palīdzību mineralizējas par neorganiskiem savienojumiem – slāpekļskābes, slāpekļpaskābes un amonija sāļiem…

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