CHEM101 Lecture Notes - Lecture 32: Cubical Atom, Coordination Number, Molecular Mass

• School: University of Alberta
• Department: Chemistry
• Course: CHEM101
• Professor: Rylan Lundgren

Document Summary

Crystalline solids: regular repeaing order to their structures, minimal moion, long range order or litle order but higher molecular mass, all components are located at a speciic site. Amorphous solids: disordered solids: no long range order, glass. Same rules/concepts apply for the other cell types: coordinaion number: how many paricles are touched or equidistant from x paricle, number of paricles at the same distance, cubic laice: all planes are equidistant and perpendicular. A cube has 8 corners, 6 faces, 12 edges, 1 centre. Simple cube: has an atom at each corner (8 paricles in total) A cornered paricle will be shared by 8 diferent unit cells. Body-centered cubic: has an atom at each corner and one in the centre (9 paricles in total) Atoms at the corners are not in contact with each other, they only touch the atom in the middle. Face centred cubic: has an atom at each corner and one on each face (14 paricles in total)