http://ro.shvoong.com/exact-sciences/chemistry/ Summaries, Abstracts, Synopses, Reviews, Notes & Short Essays on Chimie Fri, 12 May 2006 21:00:00 GMT Sumar pentru un articol după Serban Costescu; Ioana Costescu - chimia anorganica, AZOTUL Simbol chimic : N Masa atomica : 14 Numar de masa “Z”: 7 Azotul se gaseste in grupa a V-a principala ai in prima perioada in siste http://ro.shvoong.com/exact-sciences/chemistry/226884-chimia-anorganica/ support@shvoong.com http://ro.shvoong.com/exact-sciences/chemistry/226884-chimia-anorganica/ Fri, 12 May 2006 21:00:00 GMT