LIFESCI 7A Lecture Notes - Lecture 1: Atomic Mass, Surface Tension, Octet Rule
Document Summary
After completing your pre-class assignments you should be able to: Define and relate the terms electronegativity and polarity. Explain how nonpolar and polar covalent bonds are formed between atoms. Explain how the potential energy of two atoms changes as they form or break a bond. Describe each type of atomic bond and intermolecular force: nonpolar covalent bonds, polar covalent bonds, ionic bonds, hydrogen bonds, and van der waals" forces. H, c, n, o, p: most abundant element. Electron outer shell configurations are important for how atoms interact with other atoms. Octet rule: instance to fill a shell with 8 electrons. Double and triple bonds: more than 2 electrons shared. Polar covalent: electrons are not shared equally. Happens when atoms don"t have the same electronegativity. Nonpolar covalent: atoms share the electrons in the bond equally. Electronegativity: how much an atom attracts electrons. Smaller has more because they"re closer to the nucleus (protons)
