![]() ![]() ![]() Molecular Geometry: Shape of a molecule Two important factors in Molecular Geometry: Bond Angle Bond Length Tro: Chemistry: A Molecular Approach, 2/e Properties of molecular substances depend on the structure of the molecule The structure includes many factors, such as: the skeletal arrangement of the atoms the kind of bonding between the atoms ionic, polar covalent, or covalent the shape of the molecule Bonding theory should allow you to predict the shapes of molecules Tro: Chemistry: A Molecular Approach, 2/eĥ Molecular Geometry Molecules: 3-dimensional objects Sugar molecules (“Key”) fit into the active site of taste cell receptors (“Lock”): When the sugar molecule enters the active site, parts of the taste cell receptor split apart ion channels in the cell membrane to open resulting in nerve signal transmission Artificial sweeteners also fit into the same receptor, sometimes binding even stronger than sugar (making them “sweeter” than sugar) Tro: Chemistry: A Molecular Approach, 2/e ![]() Presentation on theme: "VSEPR theory Molecular Polarity"- Presentation transcript:Ģ Taste The taste of a food: Interaction between food molecules and taste cells Factors: Shape of the molecule and charge distribution within the molecule Food or “spicy” molecule fit snugly into the active site of specialized proteins on the surface of taste cells When this happens, changes in the protein structure cause a nerve signal Tro: Chemistry: A Molecular Approach, 2/e ![]()
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