(b) What determines the polarity of a molecule? the polarity of the individual bonds
the strength of the intramolecular forces
the orientation of the bonds with respect to one another
the polarity of the individual bonds as well as the orientation of the bonds with respect to one another

Explanation:

The terms “polar” and “nonpolar” usually refer to covalent bonds. To determine the polarity of a covalent bond using numerical means, find the difference between the electronegativity of the atoms; if the result is between 0.4 and 1.7, then, generally, the bond is polar covalent.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

the answer for sodium is 0.186

the answer for rubidium is 0.251