The atomic number of an atom with 14 neutrons and a mass of 27 is
27
1
13

If it isn’t a then it has to be d idk tho cause there’s no picture

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