Chemistry Supplementary Textbook Material Chapter 17 p 381 396 Be sure to attend lab this week Bring the lab manual Must pass lab to pass this class Instructors will give percent lab grade to one another Elements in Earth s Crust Oxygen Silicon Aluminum Iron Calcium Sodium Potassium Magnesium Mineral Naturally occurring Inorganic Solid Orderly crystalline structure Definite chemical composition Halite Bonding Halite Minerals Silicates most common Silicon Oxygen tetrahedron One silicon four oxygen Feldspar Quartz Hornblende Granite Bohr diagram Shells for row 2 e in first shell Up to 8 e in other shells Outer shell is valence electrons In Class Activity 1 Draw the Bohr diagram electron shell structure for silicon 1 Draw the Bohr diagram for the chloride ion chlorine with a full shell 1 Draw the Lewis diagram dot diagram for argon 1 Draw the Lewis diagram dot diagram for lithium 1 Draw the Lewis diagram dot diagram for silicon 1 If an atom gains an electron it is called Its charge is circle POSITIVE NEGATIVE circle one two three 1 If an atom loses two electrons it is called Its charge is circle POSITIVE NEGATIVE circle one two three Periodic Table Dot Diagram Symbol for element Show valence electrons only Start with one per side Up to two per side Ion dot diagram Ionic Bonds with Dot Diagram Sodium Chloride structure Single element ions Naming compounds Cations element name Anions element name changed to end with ide Chemical Formula of Ionic Compounds Find charges from periodic table Use subscripts to indicate how many of each Combine so the charges cancel to neutral Positive plus negative is zero crossover charges for subscripts Covalent Bonds Covalent Bonds Need octet of electrons surrounding element in the dot diagram Some bonds are multiple stronger Electro negativity Polar molecules Geometry of Molecules Typical Shapes of Molecules Dipole attraction in solid and liquid Dissolution of ionic substance Be sure to attend lab this week Bring the lab manual Must pass lab to pass this class Instructors will give percent lab grade to one another
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