Chapter 2, Problem 10P

Consider a hexagonal close packed cell with cell constants c and a (see figures below). Each atom in the central layer forms equilateral tetrahedron structures with the 3 atoms directly below it (bottom, red tetrahedron in figure on the right). a) Derive the ratio b) How many tetrahedral and octahedral interstitial sites are there per hcp unit cell? Explain your reasoning.

0 X hs https://gz.explorelearning.com/index.cfm?method=cReso GPolarity and Intermolecular Force X HOPS L Type here to search 3. Which of the following statements is true about the molecule shown below? Ō+ C 6- OA. The bonds are polar and the molecule is polar. OB. The bonds are polar and the molecule is nonpolar. OC. The bonds are nonpolar and the molecule is polar. D. The bonds are nonpolar and the molecule is nonpolar. Con esource Part X + 70 resourceID=1091&ClassID=643519 22

please help me answer this in physics way of explaining.