CHM120H5 Study Guide - Midterm Guide: Trigonal Planar Molecular Geometry, Octet Rule, Vsepr Theory
Document Summary
Bond energy: nrg required to break a bond. Electronegaivity: ability of an atom to atract shared electrons. Most widely accepted method for determining electronegaivity values: linus pauling. (enge generally increase across a period and decreases down a group) A molecule (like hf) that has a center of posiive charge and a center of negaive charge is called to have a dipole moment or be dipolar. Dipole moment = = qr; q = electron charge; r= a x distance. Chemical compounds are always electrically neutral they have the same number of posiive and negaive charges. Isoelectronic ions: ions containing the same number of electrons. In general there are two important facts to consider in predicing the relaive size of ions: the number of electrons and the number of protons. Since these are isoelectronic the number of electrons are the same but the number of protons increases as z(the nuclear charge) increases.
