1. Final Exam Review Review 2

2. Copy down and answer the following questions. You may use your book or notebook if necessary. 1.What are valence electrons? 2.Why are valence electrons important? 3.How many valence electrons do atoms want in their outer energy level? 4.Write dot diagrams for the following elements: Sodium, oxygen, neon, chlorine

3. Answers: 1.Valence electrons are the electrons found in the outer energy level of an atom. 2.They are important because they determine how reactive an element is. 3.Most atoms want 8. Hydrogen and Helium only need 2 valence electrons. 4. NaONeCl