Bonding (Part B): Covalent Bonds
Overview/Rationale
In this unit students study the interaction of particles in compounds using covalent bonding, where bonding occurs when atoms share electrons. Students get an introduction to VSEPR theory, and apply their understanding of molecular geometry and types of bonds to analyze polarity of molecules and resulting properties. Students differentiate between the characteristics of covalent and ionic bonds.
Student Objectives
● Identify the type of bond between two atoms by analyzing electronegativity difference.
● Describe the representative units that define molecular compounds.
● Apply the rules for naming and writing the formulas for binary molecular compounds.
● Draw the Lewis structures of different molecules and compounds.
● Predict the shapes of molecules using the VSEPR Theory.
● Predict the polarity of a molecule based on the bond type and molecular geometry.
● Differentiate between polar and nonpolar molecules based on their properties.
● Evaluate the strength and length of different types of covalent bonds (single, double, triple bonds).
● Explain resonance in molecules based on Lewis structures.
Vocabulary
Molecule, valence electrons, Lewis structures, covalent bond, single bond, double bond, triple bond,
octet rule, resonance, polarity, VSEPR Theory, electronegativity, bonding electrons, non-bonding electrons, molecular models
Department Activities:
1. Nomenclature of Molecular compounds
2. Molecular model lab-Diatomic molecule lab: https://drive.google.com/drive/folders/0B0XImXxS1gxJZzI0cTVjZGRXcVk
3. Molecular geometry lab: PSI Chemistry (HS-PS1-3) https://docs.google.com/document/d/1PY82Wa6RJDxbv4xDpTK4yStejTyuygv-1aMEr-zfu_A/edit
4. Properties of molecular compounds- Student designed lab.