Answer to Question #101540 in General Chemistry for Yahaya

Question

1.With the aid of diagram explain the energy Vs atomic distance for metallic bonding. 2. Calculate the atomic packing factor of BCC crystal structure and state its significant. 3. Define unit cells and primitive cells

Answer 1

1.

Metallic bonding is a chemical bond resulting from electrostatic attractive force between conduction electrons (-) and positively charged (+) metal ions. The atoms in metals have a strong attractive force between them and much energy is required to overcome it. Therefore a small atomic distance exist between the atoms in metallic bonding.

2.Atomic Packaging Factor, $APF =(N particle* Vparticle) /(V unit cell)$

Where N particle is the number of particles in the unit cell, V particle is the volume of each particle and V unit is volume occupied by the unit cell. The atomic packaging factor of a unit cell is relevant to the study of materials science, where it explains many properties of material such as malleability and ductility.

3. A unit cell is the smallest repeating unit having the full symmetry of the crystal structure. A primitive cell is a unit cell that contains exactly one lattice point