CHEM 111 Lecture Notes - Lecture 18: Periodic Trends, Lattice Energy, Electric Field

• School: BYU
• Department: Chemistry and Biochemistry
• Course: CHEM 111
• Professor: David Dearden

Document Summary

Take exam 1 by testing center close tomorrow. Bonding can be described as transfer of electrons from na to cl (ionic bonding) Opposite charges on the ions account for the bonding. We only need to consider the valence electrons. Nacl doesn"t really exist as molecules; it"s always a solid crystal (or separate ions in solutions) Which was should an electric field deflect a stream of water. Reversing polarity does the exact same thing (deflects toward the magnet) bonding motif in water involves sharing of electrons (covalent bonding) Electronegativity - how well/ how tightly an atom attracts electrons, computed from ie and ea. Pauling is more commonly used, mulliken is more easier conceptually. Definition measure of how tightly an atom attracts electrons, computed from ie and ea. What is the most electronegative element (ignoring the noble gases) - fluorine. H acquires an offsetting small positive charge (molecule stays neutral) We call an unequal bond like this polar.