Sa Wikipedije, slobodne enciklopedije
Nikl (Ni, latinski - niccolum) je metal VIIIB grupe. Ima 14 izotopa čije se atomske mase nalaze između 53-67, od kojih je postojano 5 (58,60,61,62,64).
Rasprostranjenost [uredi]
Zastupljen je u zemljinoj kori u količini od 80 ppm (eng. parts per million) u obliku minerala garnierita i pantlandita.
Godine 1751 otkrio ga je Axel Fredrik Cronstedt.
Nikl gradi niz kompleksnih jedinjenja kao na primjer nikolcen
Biološki značaj [uredi]
Nikl je mikroelementi prisutan u mnogim enzimima. Dnevno bi ga trebalo minimalno unositi u količini 0,3 miligrama.
Osobine [uredi]
Nikl je srebrnobijele boje blistav metal otporan na koroziju. Koristi se za prevlačenje drugih metala radi zaštite. Legure nikla i bakra se koriste za izradu kovanog novca, pribora za jelo. Nikl se takođe dodaje čeliku i drugim legurama da bi povećao njihovu otpornost na koroziju.
BW Bewise Inc. Willy Chen willy@tool-tool.com bw@tool-tool.com www.tool-tool.com skype:willy_chen_bw mobile:0937-618-190 Head &Administration Office No.13,Shiang Shang 2nd St., West Chiu Taichung,Taiwan 40356 TEL:+886 4 24710048 / FAX:+886 4 2471 4839 N.Branch 5F,No.460,Fu Shin North Rd.,Taipei,Taiwan S.Branch No.24,Sec.1,Chia Pu East Rd.,Taipao City,Chiayi Hsien,Taiwan
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