The atmosphere is:

a. the layer of water on earths surface

b. the layer of molten lave just below the earths crust

c. the layer of air surrounding earth’s surface

d. the layer of soil lying just over earth’s crust

The answer is b i think

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