1. Chapter 4 Vocabulary With your host Cory Johnson

2. Recap Elements on the Periodic Table are arranged by increasing atomic number and are situated in Periods (the rows) and Groups (the columns). Elements combine to make Compounds. Chemical Reactions take Reactants (elements or compounds!) and makes Products (elements or compounds) with different Properties. The Periodic Table says elements are either Metals, Metalloids, or Nonmetals.

3. Valence Electrons

4. Noble gases are not reactive because they have a complete Valence Shell making them “stable”. A full Valence Shell means it has a Noble Gas Configuration. In all seriousness, chemistry is all about the transfer of electrons. Lets transfer some electrons…

5. How Elements Form Compounds The Octet Rule says a compound is formed when the outer electrons equals 8

6. How Elements Form Compounds Reactions don’t occur unless atoms make contact with each other. Electrons can ONLY be Shared or Given Up. Ions are things that have a (+) or (-) charge. Ionic Bonds are formed between Ions and this new compound can be arranged with their neighboring compounds to form Crystals. Page 133 middle paragraph!!!

7. How Elements Form Compounds Ionic Bonds have “transferred” electrons while Covalent Bonds have “shared” electrons. Still needs Ions to make a reaction. Read from the last indent on page 138 to the end of that paragraph on page 139. Ionic Compounds are composed of Ions Covalent Compounds are held together by Covalent Bonds.

8. How Elements Form Compounds A Molecule is a group of covalently bonded atoms. Reminder: A Compound is a combination of two or more different elements. [Ex. H 2 ] An Electrolyte is any compound[!] that conducts electricity when dissolved in water Interparticle Forces are the forces that are between particles…

9. How Elements Form Compounds