Understanding Alloys and Pure Metals

Why are alloys manufactured in the industry?

• To make metals more malleable

• To increase the electrical conductivity

• To enhance the hardness and prevent corrosion

• To reduce the melting point

What does it mean when a metal is described as ductile?

• It can be compressed into sheets

• It can be drawn into wires

• It can resist corrosion

• It has a high melting point

How does the atomic structure of pure metals contribute to their malleability?

• Atoms are tightly packed with no space

• Atoms can slide into empty spaces when pressed

• Atoms are fixed and cannot move

• Atoms are randomly arranged

What is an alloy?

• A mixture of two or more metals, sometimes with non-metals

• A metal with a low density

• A pure metal with impurities

• A metal that cannot be corroded

Which of the following is a purpose of making alloys?

• To decrease the density of metals

• To lower the boiling point of metals

• To make metals more ductile

• To improve the beauty and luster of metals

Why are alloys generally harder than pure metals?

• They have a higher melting point

• They contain foreign atoms that disrupt the atomic arrangement

• They are made of non-metals

• They have a lower density

How do foreign atoms in alloys affect the metal's properties?

• They increase the metal's electrical conductivity

• They reduce the metal's hardness

• They prevent atoms from sliding over each other

• They make the metal more malleable

What is a common exam question related to alloys?

• List the non-metals used in alloys

• Explain why alloys are harder than pure metals

• Describe the process of making alloys

• Explain why pure metals are more ductile

What is the main reason for adding non-metals to alloys?

• To make the metal more ductile

• To improve hardness and prevent corrosion

• To enhance the metal's color

• To increase the melting point

Which of the following is NOT a characteristic of pure metals?

• High electrical conductivity

• Low density

• Malleability

• Ductility