What can we say about waves on the higher end of the
electromagnetic spectrum?
A. They have higher frequencies and less power.
B. They have more power and greater dangers.
C. They have shorter wavelengths and less
dangers.
D. They have longer wavelengths and less
danger.

Iam not going to tell you

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   

Higher temperature = molecules move around faster. and vice versa.