7.3 Show that a sphere of radius 0.73r, where r is the radius of the corner atoms, will fit in the center of a primitive cubic structure.

Which one of the following molecules is the most polarizable? F2 H2 Br2 Cl2 I2

if the ratio of the radius of a cation to the radius of an anion is 0.380, we expect ______coordination

4. The following phosphorous halide molecules contain P as the central atom. i. Draw the expected molecular shape, determine whether it is polar, and indicate the overall direction of the dipole moment. (You do NOT need to show resonance or formal charges AND if there are more than one isomer, please pick one for your answer ii. List all its symmetry elements and show all unique symmetry elements that are not the identity operator or an improper rotation. iii. Determine its point group. а. POCI3 b. РОCІBrz С. РOСІBrl