Introduction to Matter

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b. Physical

Flexibility

c. Physical

Ability to tarnish

d. Chemical

Ability to freeze

e. Physical

Ability to rust

f. Chemical

Elements

5. A pure substance that cannot be broken down into any other substances by chemical or physical means is a(n) ______element_______.

6. Is the following sentence true or false? The basic particle from which all elements are made is a molecule. __________atoms_______

7. When atoms combine, the force of attraction that holds them together is a(n) ________chemical bond_______.

8. How many atoms of hydrogen are in this water molecule? _________2____________

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Name _____Jose André M.____________ Date ______Feb 11, 2015______ Class __8A_

Introduction to Matter uided

9. What is a compound?

A substance composed of two or more different atoms.

What is the ratio of atoms in carbon dioxide, or C? CO2

10. What is the chemical formula of carbon monoxide? ___________CO1________________

11. Is the following sentence true or false? When elements chemically combine, they form compounds that have properties that are similar to those of the uncombined elements. ______False____

Mixtures

13. A(n) _____Homogeneus Mixture_____ is made of two or more substances that are together in the same place but are not chemically combined.

14. What are two ways in which mixtures differ from compounds?
a. Mixtures are made of compuonds.

b. Compounds are made of atoms.

15. Circle the letter of each mixture below that is heterogeneous.

a. damp soil b. sugar water c. brass
d. salad

16. Is the following sentence true or false? A solution is an example of a homogeneous mixture. ____True___________

17. What are two ways in which mixtures differ from compounds?

Mixtures are made of compunds, and compounds are made of atoms.

18. © Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved.