Draw and label z-layer diagrams for the following elements. Clearly draw which atoms are touching in each layer. Follow guidelines for drawing z-layer diagrams required by your instructor or no credit. a. Chromium, which crystallizes in a body-centered cubic unit cell.
b. Silver, which crystallizes in a face-centered cubic unit cell.
c. Polonium, which crystallizes in a simple cubic unit cell.

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)