1) DULL luster, usually BRITTLE, does NOT conduct electricity. What would be the best classification for this element?

• A. Metal
• B. Nonmetal
• C. Metalloid

2)A pure substance that CANNOT be broken in down.

• Element
• Compound
• Mixture

3)What is made of different kinds of atoms or molecules that are PHYSICALLY combined?

• Elements
• Compounds
• Mixtures

4)Is NaCl an element or compound?

• A. Compound
• B. Element

5)What do elements and compounds have in common?

• A. They are both represented by a chemical formula.
• B. They are both made up of only 1 type of element
• C. They are both pure substances.

6)In this type of mixture, you can see the different substances.

• Heterogenous mixture
• Homogenous mixture

7)In this type of mixture, you cannot see the different molecules, everything appears to be the same.

• Heterogenous mixture
• Homogenous mixture

8)What is a pure substance that is made up of two or more elements that are combined CHEMICALLY?

• Element
• Compound
• Mixure

9)What phase of matter is this?

• solid
• liquid
• gas
• none of these

10) Computer chips are made of semiconductors in order to avoid overheating technology. Semiconductors are

• A. Nonmetal
• B. Metal
• C. Metalloid