1)2NaBr+Cl2=Br2+2NaCl
2Br(-)-2e=Br2(0)
Cl2(0)+2e=2Cl(-)
2)Cl2+H2=2HCl
H2(0)-2e=2H(+)
3)Ca+Cl2=CaCl2
Ca(0)-2e=Ca(+2)
4)Ca+H2=CaH2
H2(0)+2e=2H(-)
1)2NaBr+Cl2=Br2+2NaCl
2Br(-)-2e=Br2(0)
Cl2(0)+2e=2Cl(-)
2)Cl2+H2=2HCl
Cl2(0)+2e=2Cl(-)
H2(0)-2e=2H(+)
3)Ca+Cl2=CaCl2
Ca(0)-2e=Ca(+2)
Cl2(0)+2e=2Cl(-)
4)Ca+H2=CaH2
Ca(0)-2e=Ca(+2)
H2(0)+2e=2H(-)