1. Identify which ions gained or lost electrons: Na + O What is the difference between cation and anion? Give an example of each. 3. Write the ions for these atoms: Indium, Sulfur, Fluorine and Calcium. Agenda Notes Chp 5-2 and 6-1 Mount Elements Homework Finish Ions Missing work

 Electrons are transferred  Metal and Non-metal ions of opposite charge  Soluble (dissolve) and dissociate in water  Conduct electricity in water

 High melting and boiling points  Can form crystals  Rarely burn (not flammable)  Hard and brittle (because of the strong attraction between the charges)

crystal lattice structure made up of (+) and (-) ions

 Electrons are shared  Nonmetal and Nonmetal  Occur in large biological molecule (protein, DNA)  Some dissolve (not all), but do not dissociate (come apart)

 Low melting and boiling points  Do not conduct electricity  Variety of textures  Usually burn (flammable)

 2 types:  Nonpolar covalent bond – when electrons are shared equally between the elements  Polar covalent bond – when electrons are attracted to one element in a compound. Giving one side a slight (–) charge and the other a slight (+) charge

 Metal atoms only  Do not dissolve  Electrons move around freely  Conduct electricity  Hard and Malleable (can bend and dent)

 Objectives: Classify compounds as having ionic or covalent bond based on its physical property: solubility, conductivity and melting point  Procedure: 1. Obtain the chemicals (half of a well) 2. Set up the apparatus and label your aluminum foil using a pencil 3. Put the chemicals on top of the aluminum foil and apply heat to it 4. Record the melting order 5. Dissolve the chemicals in water and ethanol