If lithium was an ion how would it be written

13) a 14) a15) b16) i don't know sorry17) a (maybe)

Sorry i dont understand the question can you rephase it?

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