(1)第二周期ⅣA族(2)Cl2+2OH-=ClO-+H2O(3)N4(g) ====2N2(g);△H=-882 kJ/mol(4);NCl3+3H2O==== NH3+3HClO (5)C3N4;高(6)H2B-BH3++OH-(或B2H5++OH-)
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