10. Create a table of the 7 crystal systems that differentiates them in terms of the lengths of their 3 axes and the angles between the axes.

Pick a statement which incorrectly describes steel ? A. It contains carbon atoms in the holes of its iron crystals. B. The presence of carbon-iron bonds in the alloy make steel harder and stronger than pure iron. C. Pure iron is relatively soft and ductile because it lacks directional bonding. O D. The amount of carbon directly affects the properties of steel. O E. All of these are true.

Will the (211) plane produce an X-ray diffraction peak in the FCC structure? Why or why not?

State which of the following list of properties is most descriptive of a metallic solid. High melting point, hard, usually soluble in water Malleable, ductile, good conductor of electricity Good conductor of electricity when melted Low melting point, non-conductor, usually insoluble in water None of the above

Explain briefly the difference between crystalline and amorphous regions in a polymer.

Sketch two graphs, the first for a solid that's solubility is increasing as a function of temperature, and the second for a solid whose solubility decrease as a function of temperature. Be sure to label each axis

For a BCC crystal, which has higher surface energy( 1 0 0 ) or  ( 1 1 0 )? Why?

1. Summary the classification of pores 2. Summary the factors affecting porosity

6. Draw the smallest repeating unit for each of the following polymers: a) PVC b) PS c) PP

what are the parameters that vary along the z axis of membranesm that causes anisotropy?