Name: ________________________ Period#______ Date: ________________________ 7th Grade Unit 1 Review 1. Potassium is an element that is in Bananas. Is Potassium considered a Pure Substance or Mixture? 2. What is the difference between a Pure Substance and a mixture? 3. A lava lamp mixture would be classified as what type of mixture? Explain your answer. 4. What is the difference between an element and a compound? 5. How can you identify a chemical symbol? 6. What two parts make up a chemical formula? Name: ________________________ Period#______ Date: ________________________ 7. Explain the difference on how an element is represented and a compound is represented?