Chemical Change

Name:_______________

Date:__________

1. A natural source of metal is called an ___.

2. A ________ speeds up a chemical reaction without being changed by it.

3. Burning is an example of a _______ change.

4. ____ ____________ _____ is a measure of how strong chemical bonds are.

5. The attraction of two oppositely charged ions creates the _____ bond.

6. Any chemical reaction which absorbs heat is called a __________ reaction.

7. Any chemical reaction which releases heat is called a _________ reaction.

8. _______ number is used to calculate the number of atoms in a mole.

9. ______ _ _ is the isotope on which the mole is based.

10. The ________ bond in one in which two or more atoms share electrons.

11. ________ is the name for the original substances in a chemical reaction.

12. _________ is the name for the new substance formed by the chemical reaction.

13. When a solid is formed in a chemical reaction between two liquids it is called a ___________.

14. A reaction in which an element in one compound is exchanged with an element in another compound is called a _____ reaction.

15. A chemical reaction in which a compound is formed from a combination of two or more elements or compounds is called a _________ reaction.

16. A reaction in which an element in one compound is replaced by another element is called a ______ replacement reaction.

17. ________ is the catalyst in the automobile catalytic converter.

18. The process of removing a metal from its ore is called _______.

19. antihistamines are an example of an _________.

20. _______ compounds composed of metal and oxygen.

21. A ________ ________ is used to summarize a chemical reaction.

22. The amount of energy needed to start a chemical reaction is called __________ energy.

23. A chemical reaction in which one or more of the reactants is used up is called a ________ reaction.

24. A chemical reaction in which some amount of each reactant remains is called an __________ reaction.

25. The energy of movement is called _______ energy.

26. A ____ is equal to the number of atoms needed to make a mass in grams equal to the atomic mass of that element.

27. A ______ _______ an example of a fast chemical reaction.

28. Iron _______ is an example of a very slow chemical reaction.

29. Any reaction in which a compound is broken down into two or more elements or compounds is called a ___________ reaction.

30. The ____ is the unit for measuring heat.

Chemical Change Notes
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