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completeaza in loc de puncte elementul necesar va rog mult....
elementul oxidul superior acidul/baza caracterul
Na .oxid superior........acidul baza.................caracterul         
Ca oxid superio...............acidul/baza....................caracterul.......
N   oxid superios..............acidul/baza............caracterul...........
C oxid superior.....................acid/baza...................caracterul............


Răspuns :

Na..........Na2O.........NaOH(BAZA)...........metalic
Ca       ....CaO.........Ca(OH)2.."................."
N     ......N2O5...........HN3(ACID).............nemetalic
C............CO2.............H2CO3 "................."