Objectives I can compare the properties of ionic and covalent compounds with a Venn diagram. I can practice drawing Lewis Dot Diagrams of molecules by.

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Presentation transcript:

Objectives I can compare the properties of ionic and covalent compounds with a Venn diagram. I can practice drawing Lewis Dot Diagrams of molecules by completing a worksheet. I can investigate the relationship between electronegativity and chemical bonding by sorting compounds by electronegativity data.

Ionic vs. Covalent Bonds Bond Strength = the energy needed to break the bonds between atoms in a compound.

Ionic vs. Covalent Bonds Ionic BondsCovalent Bonds Atoms in ionic compounds are held together by ionic bonds. Atoms in covalent or molecular compounds are held together by covalent bonds. Ionic bonds are stronger (more bond strength) Covalent bonds are weaker (less bond strength)

Ionic vs. Covalent Bonds Ionic BondsCovalent Bonds Formed by Transfer of electrons Formed by Sharing of electrons

Ionic vs. Covalent Bonds Ionic BondsCovalent Bonds Structure: Crystal LatticeStructure: Molecules Lithium Chloride (LiCl) crystal lattice Water (H 2 O) molecules

Ionic vs. Covalent Bonds Ionic BondsCovalent Bonds Consist of Metal and nonmetal Consist of Nonmetal and nonmetal

Ionic vs. Covalent Bonds Ionic BondsCovalent Bonds State of matter: Solid at room temp. State of matter: Solid, Liquid or Gas at room temp.

Ionic vs. Covalent Bonds Ionic BondsCovalent Bonds Conductivity? Conducts electricity when dissolved. Conductivity: Does not conduct electricity when dissolved.

Ionic vs. Covalent Think, Pair, Share: With a partner, fill in the middle overlapping portion of the Venn diagram. What do ionic and covalent compounds have in common? Possible answers: –types of compounds, formed by chemical bonds, include more than one atom, involve electrons, are formed and broken by chemical reaction

Chemistry of Life  All organisms (living things) are made of macromolecules.  Macromolecules are large covalent compounds.  The atoms in proteins, carbohydrates, nucleic acids, and lipids are all connected by covalent bonds.

3 Types of Bonding **IONIC*COVALENTMETALLIC How are Bonds Formed? ELECTRONS are transferred between ions (1 steals, 1 gives) Electrons are shared between atoms. “Sea of Electrons” Spread all over between atoms of the same element. Type of Bond Formed Solid Crystals with repeating patterns of (+) and (-) ions Usually liquid or solid Solid metal Who’s Involved ? METAL + NON- METAL NON-METAL + NON-METAL METAL AND METAL Special Properties When dissolves in H20, conducts electricity Does not conduct electricity Very good conductors of electricity on their own!