CHEM 121 Lecture Notes - Lecture 2: Ionic Bonding, Bond Length, Fluorine
79
CHEM 121 Full Course Notes
Verified Note
79 documents
Document Summary
Chem121 133 chemical bonding & lewis. Dr. andrea terpstra | 3:30-5:00 t/th | office hours: tues 5:00 6:00pm , wed 1:30 3:30pm | The average of mass for each naturally occurring isotope. Ionic bonds e is found closer to the electronegative end. The ability to attract electrons towards itself: eg) tug-of-war where the bonding occurs where there"s more electron density. Reflects other trends: ionization energy (ie) E e- + e: electron affinity (ea) E + e- e: atomic size. Cations, group i, ii anions, group 15 17 low & high ie (oxidation) high & low ea (reduction) Charges matter more than the distance between nucleus. Stability is achieved by a closed shell, or octet. # of bonding pairs of electrons between atoms. Predicts bond lengths: distane between 2 atoms, bond order, bond length, triple bond = shortest length. More electron bonding = more pull, shortest bond. Bond strengths: takes nrg to break bonds = bond dissociation nrg.
