Alloy & their Properties

The video explains the formation and properties of alloys, which are mixtures of metals that retain metallic properties but are stronger. It describes metal atoms' bonding capabilities, lattice structures, and how electrons contribute to conductivity and ductility. The historical significance of alloys, such as bronze, is highlighted. The video also covers metal bonding, dislocation, and how adding different atoms can strengthen alloys. Finally, it provides examples of common alloys and their applications.

What characteristic of metal atoms allows them to form alloys?

• They have a full outer electron shell.

• They can bond with up to 12 other atoms.

• They have fixed proportions in compounds.

• They are non-conductive.

Why was bronze preferred over copper in early human history?

• Bronze was twice as hard as copper.

• Bronze was easier to find.

• Bronze was more abundant than copper.

• Bronze was softer than copper.

How does the introduction of different atoms into a metal lattice affect its properties?

• It makes the metal more ductile.

• It makes the metal softer.

• It blocks the easy movement of dislocations.

• It increases the metal's conductivity.

Which of the following is a common use for brass?

• Surgical tools

• Building construction

• Dental fillings

• Musical instruments

What is the composition of stainless steel?

• Iron with 3/4 copper and 1/4 tin

• Iron with 70% copper and 30% zinc

• Iron with 18% chromium and 8% nickel

• Iron with 99% carbon