The atomic mass is... A. Equal to the number of protons

B. equal to the number of protons + neutrons

C. Equal to the number of protons-electrons

D. Equal to the number of electrons

E. none of the above

You know how the first one if filled up like the objects do the same but with the other categories

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   

It must be measured in k.hope my answer is to you : )