Question

explain the bonding in H2 ,O2,N2,CH4

Answer 1

H2 will have a covalent bond,ie a single bond between the two H atoms
O2 will have a covalent bond,ie double bond is present between the O atoms.
N2 will also have a covlaent bond,ie a triple bond will be present between the atoms.
CH4 will also have a covalent bond.
          
                                        
                                        
                                   H-H-C-H-H