Chemical Changes Challenge Instructions 1. Make teams. 2. One person from the 1 st team chooses a number. 3. Everyone answers the question. 4. The person.

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Presentation transcript:

Chemical Changes Challenge

Instructions 1. Make teams. 2. One person from the 1 st team chooses a number. 3. Everyone answers the question. 4. The person can choose someone from his/her team to answer it points if both gets it right points if only one gets it right. 7. 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.)

Chemical Changes

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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