2Na+H2===2NaH4Na+O2===2Na2O2Na2O+O2===2Na2O22Na+O2===Na2O22Na+S===Na2S（爆炸）2Na+2H2O===2NaOH+H22Na+2NH3===2NaNH2+H24Na+TiCl4（熔融）===4NaCl+Ti2Al+3Cl2===2AlCl34Al+3O2===2Al2O3（钝化）4Al(Hg)+3O2+2x...