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Chemical Changes

Chemical Changes. Challenge. Instructions. Make teams. One person from the 1 st team chooses a number. Everyone answers the question. The person can choose someone from his/her team to answer it. 10 points if both gets it right. 5 points if only one gets it right.

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Chemical Changes

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  1. Chemical Changes Challenge

  2. Instructions • Make teams. • One person from the 1st team chooses a number. • Everyone answers the question. • The person can choose someone from his/her team to answer it. • 10 points if both gets it right. • 5 points if only one gets it right. • Challenge: can choose someone from another team to show their answer. If that person has it right that team will get 5 pts. If it is wrong, they lose 5 pts. (Can only choose each person once per game.)

  3. Chemical Changes

  4. 1. What is the chemical combination of two or more substances?Click for answer Answer: compound

  5. 2. What are the links that atoms or atomic-sized particles can form with one another? Click for answer Answer: chemical bonds

  6. 3. What is a way of using letters and numbers to show how much of an element is in a substance? Click for answer Answer: chemical formula

  7. 4. What is an electrically charged particle with unequal numbers of protons and electrons called? Click for answer Answer: ion

  8. 5. What a group of covalently bonded atoms that act like a single particle called? Click for answer Answer: molecule

  9. 6. What is a way of describing a substance by how it reacts to other substances? Click for answer Answer: chemical property

  10. 7. A chemical reaction that gives off heat is called what? Click for answer Answer: exothermic

  11. 8. What is a chemical reaction that absorbs energy called? Click for answer Answer: endothermic

  12. 9. What is a change that produces substances that have a new and different properties called? Click for answer Answer: chemical change

  13. 10. What kind of bonds do nonmetals usually form? Click for answer Answer: covalent bond

  14. 11. What kind of bond occurs when an atom of sodium joins an atom of chlorine to form sodium chloride? Click for answer Answer: ionic bond or chemical bond

  15. 12. What kind of change occurs when iron rusts? Click for answer Answer: chemical change or synthesis reaction

  16. 13. What type of chemical reaction is Mentos put into Diet Coke? Click for answer Answer: decomposition reaction

  17. 14. The original substances in a chemical reaction is called what? Click for answer Answer: reactants

  18. 15. The new substance produced from a chemical change is called what? Click for answer Answer: products

  19. 16. Which chemical reaction has one element replaces another? Click for answer Answer: replacement reaction

  20. 17. What is the chart of elements arranged by the atomic number? Click for answer Answer: Periodic Table

  21. 18. The first column of the Periodic Table is very reactive with ___________. Click for answer Answer: water

  22. 19. Elements of the last column of the Periodic Table that contain elements that rarely form compounds with other elements are called _________. Click for answer Answer: Noble Gases

  23. 20. The middle columns of the Periodic Table contain mostly what type of element? Click for answer Answer: metals

  24. 21. What is an electrically charged atom called? Click for answer Answer: ion

  25. 22. Which kind of bond shares atoms? Click for answer Answer: covalent bonds

  26. 23. What is the last shell of an atom called? Click for answer Answer: valence

  27. 24. How many electrons are in the first shell of an atom? Click for answer Answer: 2

  28. 25. What does the 2 represent in the chemical formula H2O. Click for answer Answer: there are 2 hydrogen atoms for every 1 oxygen atom to make water.

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