In this chapter you will be able to:

• State the differences between physical and chemical changes
• Determine if chemical reactions has taken place and give their examples
• Predict the product and write the equation of reactions between metals and acids
• Predict the product and write the equation of reaction between metal carbonates and acids
• Explain the rearrangement of atoms in a chemical reaction
• Explain the idea of conservation of mass
• Explain the idea of unexpected result with regard to the conservation of mass
• State evidences of chemical reaction has taken place
• Explain the idea that not all reactions are useful
• State conditions needed for rust to form
• Explain how to protect iron from rusting