Question 1 (5 points) In the image below, if the frisbee represents light, what does the fence represent?

Quick!

Q2eqefefgvsdfvfefsvsdvcwef

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   

The answer is not c

Ithink about 50 % of an original isotope's number of atoms remain