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Chemical Changes Challenge Instructions 1. Make teams. 2. One person from the 1 st team chooses a...
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Transcript of Chemical Changes Challenge Instructions 1. Make teams. 2. One person from the 1 st team chooses a...
Chemical Changes
Challenge
Instructions
1. Make teams.2. One person from the 1st team chooses a number.3. Everyone answers the question.4. The person can choose someone from his/her team to
answer it.5. 10 points if both gets it right.6. 5 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
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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 H2O. Click for answer
Answer: there are 2 hydrogen atoms for every 1 oxygen atom to make water.
