Inorganic Chemistry - Exam 2 with 100% Correct Answers | Verified | Updated

Inorganic Chemistry - Exam 2 with 100% Correct Answers | Verified | Updated Why are metals electrically ____________? - answer- conductive - They have valence electrons that are delocalized A result of having delocalized electrons, metals have ______________ properties. - answerreflective (shiny) Explain why metals are malleable. - answerThe atoms are arranged in uniform rows which can slide over one another. The structure of a metal can best be described as a ___________ consisting of _________ _________ that are ____________ structures. - answer- lattice - unit cell - repeating List the types of metal lattice packing structures? - answer- simple cubic - body-centered cubic - face-centered cubic (cubic close packed) - hexagonal close packed If a lattice point is located on the edge of a unit cell it counts for how much of an atom? - answer1/4 If a lattice point is located on the corner of a unit cell it counts for how much of an atom? - answer1/8 The coordination number of a lattice packing structure depends on... - answerthe number of atoms that touch a select atom. ____________ influences the lattice packing structure of a metal. How can this property be influenced? - answer- bonding (covalent, ionic, polar covalent) - radial nodes create weaker bonding - An increase in atomic radius allows for the formation of shorter bonds that are stronger. Coordination number of simple cubic structure? Atoms per unit cell? - answer6, 1 Coordination number of body-centered cubic structure? Atoms per unit cell? - answer8, 2 Coordination number of hexagonal close-packed structure? Atoms per unit cell? - answer12, 6 Coordination number of face-centered cubic structure? Atoms per unit cell? - answer12, 4 Close-packed structures can have _______ (structural property that only these structures can have) that can be filled with additional _______ or ________. - answer- holes - ions - atoms Octahedral holes can accommodate a sphere with a radius no larger than...what is the ratio of holes to close-packed spheres? - answer- 0.414r - N close-packed spheres : N octahedral holes (1:1) Large spheres in ionic bonding usually depict what ions in lattice structures? What about small spheres? - answer- anions - cations Tetrahedral holes can accommodate a sphere with a radius no larger than...what is the ratio of holes to close-packed spheres? - answer- 0.255r - N close-packed spheres : 2N tetrahedral holes (1:2) Polymorphism - answerability to adopt different crystal forms under different conditions of temp and pressure. Close-packed structures form under ________ pressure and _________ temperature. - answerhigh, low Simple cubic structures form under ________ pressure and _________ temperature. - answerlow, high Body-centered cubic structures form under ________ pressure and _________ temperature. - answerlow, high Why would close-packed structures tak