How is a compound formed differently than a mixture, and how can each be broken down into their original substances? -in ur own words please.-

I’m not sure what your trying to say here.. can you clarify again?

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   

A(apex