BIOL 112 Lecture Notes - Surface Tension, Partial Charge, Hydrogen Bond

• School: McGill University
• Department: Biology
• Course: BIOL 112
• Professor: Frieder Schoeck

Document Summary

Focus on these elements: hyrogen, carbon, nitrogen, oxygen, phosphorus, and sulfur (yellow: nitrogen and oxygen make up our entire weight. There are a couple of ions that should be noted also. (pinkish red) Recognize the atomic number, chemical symbol, and atomic mass shown in periodic table: the number of protons defines the element, atomic mass (exactly) protons + neutrons because of isotopes. Same number of protons, different number of neutrons. Identical chemical properties, but could be unstable and radioactive. To form a molecule with chemical bonds, only the valence electrons matter: molecule: 2 or more atoms bonded by a chemical bond. Hbm: hydrogen bond, occurs with hydrogen bonded to a highly electronegative atom (usually oxygen or. Nitrogen: creates positive partial charge, partial charge on hydrogen forces the hydrogen to be attracted to oppositely charged atoms or molecules, this does not involve sharing of electrons hydrogen bonding. Ice is less dense than water [some random info he decided to put in]