3
the relative atomic mass of chlorine is 35.5. what does this tell you about the relative
abundance of the two naturally occurring isotopes of chlorine, ci 35 and ci 37?
explain your answer.

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13) a 14) a15) b16) i don't know sorry17) a (maybe)

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