: 57: 0: 0: –7: 57c0——> : 56: 50:
a resonance structure, like the one above, represents

The answer is b because a,c,and d are opinons

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf