LIFE 102 Lecture Notes - Evaporative Cooler, Hydrogen Bond, Heat Capacity
Document Summary
A hydrogen bond forms when a hydrogen atom covalently bonded to one electronegative atom is also attracted to another electronegative atom. In living cells, the electronegative partners are usually oxygen or nitrogen atoms. If electrons are distributed asymmetrically in molecules or atoms, they can result in hot spots of positive or negative charge. Van der waals interactions are attractions between molecules that are close together as a result of these charges. Biological molecules recognize and interact with each other with a specificity based on. Molecules with similar shapes and charges can have similar biological effects. Concept 2. 4: chemical reactions make and break chemical bonds. Chemical reactions are the making and breaking of chemical bonds. The starting molecules of a chemical reaction are called reactants. The final molecules of a chemical reaction are called products. Concept 3. 1: the polarity of water molecules results in hydrogen bonding. Polarity allows water molecules to form hydrogen bonds with each other.
