1. SECTION 1.2 PAGES 8-11 Types of Chemical Bonds

2. Ion Formation Ions are charged particles that form during chemical changes when one or more valence electrons transfer from one atom to another. Charge becomes 1+ because there is one more proton than electron.

3. An ionic bond is the force of attraction between oppositely charged ions. Ionic bonds are formed when a positive ion transfers electrons to a negative ion. Compounds held together by ionic bonds tend to be good conductors of electricity. Ionic Bonds

5. Ions Bond to Form a Crystal Lattice The arrangement of bonded ions in a crystal lattice determines the shape of the crystals of an ionic compound.

6. Properties Of Ionic Bonds High Melting Point High Boiling Point Brittle solids at room temperature Usually break apart when hit with a hammer. Ionic compounds are hard crystalline solids Usually soluble in water Ionic compounds conduct electricity when dissolved in water.

7. Bonds do not involve ions. An covalent bond is the force of attraction between the nuclei of atoms and the electrons shared by the atoms. Two nonmetal atoms bond by sharing electrons with one another.. Covalent Bonds

8. Covalent Bond The SHARED electrons spend most of their time BETWEEN the nuclei of the atoms The protons and the SHARED electrons attract one another. This attraction is the basis of the covalent bond.

9. Covalently Bonded Atoms Make Up Molecules

11. The Simplest Molecules ALL molecules are composed of at least two covalently bonded atoms. The simplest molecules are diatomic molecules. Diatomic Fluorine Molecule

12. More Complex Molecules Some covalently bonded molecules are more complex A molecule of sucrose is composed of carbon atoms, hydrogen atoms, and oxygen atoms joined by covalent bonds.

13. A metallic bond is the force of attraction between a positively charged metal ion and the electrons in a metal. Two nonmetal atoms bond by sharing electrons with one another. Metallic Bonds

14. Electrons move throughout a metal Valence electrons move throughout the metal from the energy level of one atom to the energy levels of the atoms nearby. The moving electrons are attracted to the metal ions, forming metallic bonds.