7 Elements, Compounds, and Mixtures Worksheet Unit 1 Lesson 4

1. All pure substances are elements.

• True
• False

2. Atom is the smallest unit of an element.

• True
• False

3. Homogeneous mixtures are also called solutions.

• True
• False

4. Mixtures cannot be broken down into anything simpler by physical methods.

• True
• False

5. ______________ is a pure substance containing only one kind of atom.

6. ______________ is a pure substance containing two or more kinds of atoms.

7. ______________ is a substance made up two or more different substances physically combined.

8. A ________________ mixture is a mixture in which the composition is not uniform throughout the mixture.

9. A ________________ mixture is a mixture in which the composition is uniform throughout the mixture.

11. Which of the diagrams below represent a compound made of two elements?

• A
• B
• C
• D