Alloys: Types and Examples

The video tutorial covers metallic bonds and how metals form alloys. It explains the structure of alloys, including substitutional and interstitial types, and how these structures affect properties like malleability. Examples such as steel, brass, and bronze are discussed, highlighting their unique properties and applications in various fields. The tutorial concludes by encouraging further study in material science.

What is a substitutional alloy?

• An alloy that contains only one type of metal.

• An alloy where smaller atoms fit into the gaps between larger atoms.

• An alloy that is formed by mixing nonmetals with metals.

• An alloy where atoms of one element are replaced by atoms of another element in the lattice.

How do interstitial alloys differ from substitutional alloys?

• Interstitial alloys have atoms of the primary metal replaced by larger atoms.

• Interstitial alloys have smaller atoms fitting into the gaps between larger atoms.

• Interstitial alloys are made by mixing nonmetals with metals.

• Interstitial alloys are less dense than substitutional alloys.

Why is steel less malleable than pure iron?

• Because it contains a higher percentage of iron.

• Because the carbon impurity makes it more difficult for the metal to deform.

• Because it is a substitutional alloy.

• Because it is made entirely of nonmetals.

Which element is added to steel to improve its resistance to corrosion?

• Chromium

• Cobalt

• Nickel

• Manganese

What is bronze primarily composed of?

• Tin and bismuth

• Copper and tin

• Iron and carbon

• Copper and zinc