What molecule represents this structure

A)NH4
B)NH3
C)NH4+
D)NH3+

Organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

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