Physical Science: 9b Quiz

4 Questions | Total Attempts: 76

SettingsSettingsSettings
Please wait...
Physical Science Quizzes & Trivia

Physical Science: 9B Quiz


Questions and Answers
  • 1. 
    In a reaction, iron metal changes to iron oxide.  If 20 atoms of iron change, how many atoms of iron are in the resulting iron oxide?
    • A. 

      10

    • B. 

      20

    • C. 

      40

    • D. 

      Unknown

  • 2. 
    The formulas on the left side of an equation that show the arrangement of atoms before the chemical change takes place represent ________________________.
  • 3. 
    The numbers in front of formulas in an equation are called ____________________.
  • 4. 
    Scientists use  ____________________ _____________________ to describe the changes that take place during a reaction.