Question

Question 4-9

1. What are the four types of bonding observed in solids? c ndeCavalent bonang 2. Rank the four types of bonding from strongest to weakest. io<>coaletxalic>H-ro İ 3.1 Derive an algebraic expression for the equilibrium spacing, re of an ionic bond that follows the equation E, in terms of A, B, n, and E. 4. 5. What is the force between the two atoms at the equilibrium spacing? atonic force What is the number of atoms per unit cell for the following crystal structures? a. Simple cubic b. Face-centered cubic c. Body-centered cubic d. NaCI (provide number of Na and Cl ions per unit cell) e. Caf2 (provide number of Ca and F ions per unit cell) f. ZnS (provide number of Zn and Z ions per unit cell) g. CsCI (provide number of Cs and Cl ions per unit cell) 6. Derive the relationship between the lattice parameter, aor and the atomic radius, R, for: a. b. c. Face-centered cubic crystals Body-centered cubic crystals Simple cubic crystals 7. Derive the relationship between density and atomic radius for: a. Face-centered cubic crystals b. Body-centered cubic crystals c. Simple cubic crystals Compare the published density of the following metals to the density calculated using the method from problem 6. What is the percentage difference? 8. a. Aluminum b. Gold c. Iron d. Tungsten What is the planar density for atoms on the following planes in the following crystals? Express your answers in terms of ao or R e.g. 5.23 atoms/R2 or 2.44 atoms/a,2 9. a. b. c. 111 in FCC and BCC 110 in FCC and BCC 100 in FCC and BCC

Answer 1