Barium belongs to the same chemical family as magnesium, Predict the reactivity of barium to that of magnesium and justify your prediction

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   

What record? the question is incomplete

It could possibly be beneficial if the experiment is successful.

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