Alithium ion is much less reactive than a lithium atom because it

atom is not stable it has some extra electrons which the atom cannot bear so after that the atom loses an electron it becomes stable and because it is stable it is less reactive in comparison to the atom

What’s the solution?

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