MIME 260 Lecture 2: Lecture 1 Mime 260-Ch 1-atom binding_19 updated (1)

• School: McGill University
• Department: Mining & Materials Engineering
• Course: MIME 260
• Professor: Mihriban. O. Pekguleryuz

Document Summary

Atom bonding in a solid & preliminary classification of materials. The type of atom bonding in solids determines. When metals bond with each other through metallic bonding. When two or more nonmetals bond with each other through covalent bonding. Semi-metals (metalloids) behave sometimes as metals some times as non-metals in ceramics (e. g. bn, tib2) metal metalloid nonmetal. Binding energy in solid crystals (cid:1) when atoms are far apart there is no interatomic energy between them. When they approach an attractive energy builds between the positive core of atom a and negative electrons of atom b. Binding (cohesive) energy ranges depend on the type of. Note that the low binding energy curve is shallower than the high binding energy curve. s. Taking the derivative of the energy vs distance curve we find the interatomic force: At the equilibrium distance 2r zero force is acting to repel or attract the atoms. 2r is the interatomic spacing in the solid crystal r r.