Now that you have explored the d-block, go through the elements in the s-, p-, and f-blocks. You will notice that some elements have exceptions to the electron configuration rules. Select all of the blocks that contain elements with exceptions.

Neither model is able to show the reactivity of potassium.

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