1. Nature of Matter

2. Atom smallest unit of matter that cannot be broken down by chemical means

4. Parts of an atom Proton – part of the nucleus, positive charge Neutron – part of the nucleus, no charge Electron – Part of a cloud surrounding the nucleus, negatively charge Nucleus is positive and the electron cloud is negative and opposite charges attract so the cloud and nucleus are strongly attracted to one another

5. Location of Proton, Neutron and electron

6. Element Pure substance made of only one kind of atom

7. Molecule a group of atoms held together by covalent bonds (share electrons)

8. Compound Group of atoms (may be 2 or more different elements) joined together

9. Covalent Bond bond that forms when two or more atoms share electrons to form a molecule

10. Water Molecule

11. Hydrogen Bond A weak chemical attraction between polar molecules. Opposites attract!! Water molecule to water molecule. Go to drawing

12. 2 water molecules

13. Ionic Bond Ions of opposite charge may interact to form an ionic bond

14. Sodium Chloride Ionic Bond

15. The End of the Chiefs