1.Ca+S=CaS
2.2Al+3S=Al2S3
3.Al+P=AlP
4.3Ca+2P=Ca3P2
5.K+O2=KO2
6.Mg+Cl2=MgCl2
7.H2+Cl2=2HCl
8.N2+O2=2NO
9.2Na+H2=2NaH
10.2AgCl=2Ag+Cl2
11.Zn+Br2=ZnBr2
12.2Al+3Cl2=2AlCl3
13.4Al+3O2=2Al2O3.
14.2Fe+3Cl2=2FeCl3
15.3Fe+2O2=Fe3O4.
16.2HgO=2Hg+O2
17.2Ag2O=4Ag+O2.
18.2Au2O3=4Au+3O2.
19.4P+5O2=2P2O5
20.6Li+N2=2Li3N
21.2H2+O2=2H2O
22.N2+3H2=2NH3
23.2B+3F2=2BF3
24.2CO+O2=2CO2
25.2SO2+O2=2SO3
26.2FeCl3+Fe=3FeCl2
27.2FeCl2+Cl2=2FeCl3