Structure and Properties of Materials

What is the smallest unit of matter?

• Cell

• Atom

• Molecule

• Compound

A vacuum contains no particles.

• True

• False

Which of the following is a halogen in period 5?

• Cl

• Br

• I

• F

Elements in Group 1 are known as _________.

• alkali metals

• noble gases

• halogens

• transition metals

Which property is NOT true for metals?

• A) Conduct electricity

• B) Dull appearance

• C) Malleable

• D) Strong

Match each alloy to its component metals.

• Bronze

• Copper + Tin

• Brass

• Copper + Zinc

• Steel

• Iron + Carbon

Iron is a metal. Which property does it likely have?

• Poor conductor

• Dull

• Shiny

• Brittle

In a mixture, the components are chemically bonded.

• True

• False

What is the chemical symbol for Copper?

• A) Co

• B) Cu

• C) C

• D) Cr

State one reason why alloys are used instead of pure metals.

• They are stronger or do not rust easily.

• They are more expensive than pure metals.

• They are less durable than pure metals.

• They are more likely to corrode than pure metals.