Students studying solid-state physics are discussing the
microscopic structure of
materials.
Which student's statement
correctly identifies the nature
of these materials?

It is 4.92 e-4 sorry if i am wrong

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