2. Summary of ionic compounds 1. Electrically neutral –The net charge of the compound is zero 2. Formed from Cation(s) & Anion(s) –Electrons are given away or gained 3. Metal ion and a Nonmetal ion 4. 8 IS GREAT

3. Covalent - Molecular compounds

4. Covalent Compounds Made up from NONMETALS Electrons are shared to make an Octet

5. Molecular/covalent compounds characteristics Can be solids, liquids or gases at room temperature Low melting points Don’t conduct electricity Stay together as molecules Are often insoluble

6. Water Molecule

7. Animated Covalent bonds Hydrogen: http://www.visionlearning.com/library/flash_viewer.php?oid=1348&mid=55 Water: http://web.visionlearning.com/custom/chemistry/animations/CHE1.7-an-H2Obond.shtml

8. Ionic vs. Covalent Ionic Compounds Contain positive and negative ions (Na+Cl-) Solids such as table salt High melting and boiling points Separate into charged particles in water to give a solution that conducts electricity Electrons are taken/given Metal and non-metal Soluble Covalent Compounds Exist as neutral molecules CO 2 Solids, liquids,or gases Lower melting and boiling points Remain as same molecule in water and will not conduct electricity Electrons are shared Made of non-metals Often insoluble