CHE 106 Lecture Notes - Lecture 18: Electronegativity, Double Bond, Electron Affinity

• School: Syracuse University
• Department: Chemistry
• Course: CHE 106
• Professor: J.French

Document Summary

Ionic : electrostatic interaction b/w ions of opposite charges (coulumb"s law) Metallic: metal atoms bonded to each other. Electron transfer from a metal (cation) to a nonmetal (anion) The number of electrons gained or lost is determined by how close that atom is to becoming a noble gas. Therefore, atoms tend toward noble gas character. (often 8 valence electrons octet) Cation: na (g) na+ (g) + 1e- Anion: cl (g) + 1e- cl- (g) Cl ([ne]3s23p5) + 1e- cl- ([ne]3s23p6) Consider the transfer of a valence e from a sodium atom to a chlorine atom. The resulting ions are electrostatically attracted to one another. The attraction of these oppositely charged ions is the . Lewis electron-dot symbol: used to represent the number of valence electrons or ion. Where electrons are represented by individual dots. The group number equals the number of valence electrons.