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Rhodium (Rh) — element nr 45, edelmetaal van die platinum-groep, ontdek deur William Wollaston. Het 'n hoë katalytiese aktiwiteit en word gebruik in motorvoertuigkatalysatore, joewelerbedryf en chemiese industrie.
Catalog: Химия 
35 days ago · From South Africa Online
Rutenium (Ru) — element nr. 44, platina metaal, ontdek deur professor Karol Claus van die Kasan Universiteit in 1844 en genoem na Rusland. Geskiedenis van die ontdekking, unieke eienskappe en toepassings.
Catalog: Химия 
35 days ago · From South Africa Online
 

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