Metallic Properties in Alloys Quiz

What is an alloy?

• A type of crystal lattice

• A non-metallic compound

• A mixture of two or more metallic elements

• A pure metal element

Why are alloys stronger and harder than their constituent elements?

• Because they have a specific elemental ratio

• Due to the irregular atomic crystalline pattern in alloys

• They have a higher melting point

• They contain only one type of metal

What type of alloy is formed when atoms of two or more metallic elements are nearly the same size?

• Substitutional alloy

• Interstitial alloy

• Ionic alloy

• Covalent alloy

What happens when atoms of two or more metallic elements are significantly different sizes?

• They lose their metallic properties

• They become less conductive

• They form an interstitial alloy

• They form a substitutional alloy

What is an example of an interstitial alloy mentioned in the text?

• Brass

• Aluminum

• Bronze

• Steel

Why are alloys less conductive and less ductile than their constituent elements?

• Because they have a lower density

• They contain impurities

• Due to the regular atomic crystalline pattern in alloys

• The alternating crystal pattern makes bond dislocations difficult

What makes steel stronger than pure iron?

• The presence of chromium atoms

• The interstitial carbon atoms

• The lack of metallic bonds

• The irregular atomic structure

What property of stainless steel is mentioned in the text?

• Anti-corrosive property

• Low melting point

• High reactivity with oxygen

• High electrical conductivity

Where do interstitial elements reside in an alloy?

• Within the metallic bonds

• In defects among the crystal pattern

• On the surface of the alloy

• In the core of the alloy

What type of crystal structure is formed in an interstitial alloy?

• Regular and symmetrical

• Interrupted by interstitial atoms

• Hexagonal lattice

• Cubic lattice