Kule minyaka engu-50 edlule, kuye kwenziwa ucwaningo olunzulu mayelana nemiphumela ye-catalytic yezinto ezingavamile (ikakhulukazi ama-oxides nama-chloride), futhi eminye imiphumela evamile iye yatholakala, engafinyezwa kanje: 1. Esakhiweni se-elekthronikhi sezinto ezingavamile zomhlaba , ama-electron angu-4f akhona...
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