Which of these rules are applicable for naming covalent compounds?
1.metal name + nonmetal name + suffix –ide
2.nonmetal name + nonmetal name + suffix –ide
3.metal name + nonmetal name + suffix –ite
4.nonmetal name + nonmetal name + suffix –ite
1.metal name + nonmetal name + suffix –ide
2.nonmetal name + nonmetal name + suffix –ide
3.metal name + nonmetal name + suffix –ite
4.nonmetal name + nonmetal name + suffix –ite