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