Which type(s) of bonds are found in a solid block of the polymer polypropylene (C3H6)n?  

For a cubic crystal, which of the following planes would have the LARGEST diffraction angle when characterized using x-ray diffraction?

The notation for a body-centered lattice is:

True/False: Because of their rigid bonding angles, covalent solids usually have more open crystal structures than ionic solids.

True or False: The (121), (242), and (484) planes are all parallel with one another in a cubic crystal. 

Which of these images shows the [221] direction in a unit cell?

True/False: Because of their rigid bonding angles, covalent solids usually have more open crystal structures than ionic solids.

Which of these is the proper Miller Indices notation for the “FAMILY OF ‘111’ DIRECTIONS”? 

Which of the following statements are true about Ca–O and K–Cl bonds? 

What type(s) of rotational symmetry does this object have? (ignore shading)  i. 1-fold symmetry ii. 2-fold symmetry iii. 4-fold symmetry