Reference no: EM132362980

Methods:

Part A:

Electron-Dot Structure

• Write the electron arrangements for atoms and their ions. Then determine the number of electrons either lost or gained and write the electron-dot structure of the ion that each would form along with its symbol, ionic charge, and name.

Part B: Ionic Compounds and Formulas

• Observe NaCl which is sodium chloride. Then describe its appearance and record its density and melting point.
• Use the periodic table to write the positive and negative ion in each compound. Use charge balance to write the correct formula. Use subscripts when two or more ions are needed.
• From the formula of each ionic compound, write the compound name by placing the metal name first, then the nonmetal name ending in ide.

Part C: Ionic Compounds with transition metals

• Observe FeCl3. Repeat the first two steps above with NaCl which is sodium chloride.
• Form the formula of each ionic compound. Write the compound name by placing the metal first, then the nonmental name ending in ide. Make sure to indicate the ionic charge if the transition metal has a variable valence by using a roman numeral or using the ous or ic ending.

Part D: Ionic Compounds with Polyatomic Ions

• Observe potassium carbonate. Repeat the first two steps above with NaCl.
• Name the compounds listed, using the correct names of the polyatomic ions.

Part E: Molecular Compounds

• Write the electron dot structure for each nonmetal.
• In the display of compounds observe water. Repeat the first two steps above with NaCl.
• Write the electron-dot structure for each covalent compound. Name each compound, using prefixes to indicate the number of atoms of each element. By convention, the prefix mono can be omitted from the name of the first non-metal.

Part F: Electron Dot structures and Molecular Shape

• Obtain a molecular model set and build a model of each of the molecules or ions listed in the report sheet.
• Complete the following for each of the molecules or polyatomic ions listed in the report page.

1. Draw the electron dot structure.

2. Count the electron groups around the central atom.

3. Use VSEPR to determine the electron geometry.

4. Determine the bond angle.

5. Count the numbers of atoms bonded to the central atom.

6. Use the number of bonded atoms to identify the molecular geometry.

7. Indicate if the molecules listed would be polar or nonpolar.