unit 2

A student is implementing an investigation of physical properties using samples of metals, nonmetals, and metalloids. She used a battery, wires, and a bulb to test if each of the samples will complete the circuit causing the bulb to light. Next, she shined a bright light on each of the samples.

Which physical properties is the student investigating?

• Streak and hardness

• Luster and conductivity

• Streak and conductivity

• Hardness and luster

The capability of a substance to be molded and shaped, or hammered into sheets without breaking is known as —

• ductility

• conductivity

• malleability

• luster

The capability of a substance to be stretched into thin wires without breaking is known as —

• malleability

• conductivity

• luster

• ductility

Copper is a common metal. Which of the following properties does this metal most likely have?

• Low conductivity, low malleability, and low luster

• 
  High conductivity, high malleability, and low luster

• Low conductivity, high malleability, and high luster

• High conductivity, high malleability, and high luster

A student is examining an object in science class. It is solid, does not conduct, malleable but not ductile, and is a shiny silver color.

The sample is most likely a —

• nonmetal

• metalloid

• metal

• semi-conductor

A student is examining an object in science class. It is a pale yellow, brittle solid, with no shine.

The sample is most likely a —

• nonmetal

• metalloid

• metal

• semi-conductor

A company is designing a new cell phone. They need a solid material that conducts electricity and can be made into a thin wire.

Which material would best fit their needs?

• Nonmetal

• Metalloid

• Metal

• Semi-conductor

Which of the following best replaces X in the table above?

• Chemical composition

• Malleability

• 
  Reactivity

• Oxidation

How would you classify sample 3 on the table above?

• Metal

• Nonmetal

• Metalloid

• Compound

Students tested four materials by hitting each sample with a hammer to compare them for malleability. The table below shows the results of their tests.

Which sample is most likely a nonmetal?

• Sample A

• Sample B

• Sample C

• Sample D