MTE2541 Lecture Notes - Lecture 1: Phosphide, Electrostatics, Nanostructure

• School: Monash University
• Department: Engineering - Materials
• Course: MTE2541
• Professor: All

Document Summary

[2] sodium chloride (nacl) is almost completely ionically bonded. [4] what kind of bonding do you expect in the following materials: gdo-covalent, Gdte-metallic or covalent, so2-covalent, rbi-ionic, fec-covalent, c6h6- covalent, inas-covalent, agcl-ionic, uh3-covalent, gasb-covalent, cas-ionic, Bn-covalent, cufe-metallic (many could be hybrids, and the main thing to bear in mind is the difference in electronegativity. If this is large, ionic bonding may be expected, but generally only if one or two electrons are transferred) [5] without looking at the periodic table, determine whether each of the following electron configurations is an inert gas, a halogen, an alkali metal, an alkaline earth metal or a transition metal. Check your answers by using the periodic table: 1s22s22p63s23p63d74s2, 1s22s22p63s23p6, 1s22s22p5, 1s22s22p63s2, 1s22s22p63s23p63d24s2, 1s22s22p63s23p64s1. [6] briefly cite the main differences between ionic, covalent and metallic bonding. Answer: the standout differences are that (1) metallic bonding has free electrons, and (2) covalent bonding is highly directional. Otherwise the primary bonding is non-directional and electrons are localised.