Alloys and Their Properties
Chemistry ⇒ Metals and Non-metals
Alloys and Their Properties starts at 9 and continues till grade 12.
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Describe how the structure of alloys differs from that of pure metals.
Describe one use of brass and explain why it is suitable for that use.
Describe the difference between an interstitial and a substitutional alloy.
Explain why alloys are less malleable than pure metals.
Explain why alloys are often used instead of pure metals.
Explain why pure gold is not used for making jewelry.
Explain why solder is used for joining electrical wires.
Name the alloy used for making coins and state its main components.
Name two main elements present in brass.
State one reason why pure iron is not used for making tools.
What is an alloy?
Which element is added to iron to make it stainless steel?
A certain alloy is made by combining 70% copper and 30% zinc by mass. If a manufacturer wants to produce 500 kg of this alloy, how much zinc is required?
A scientist is designing a new alloy for use in marine environments where both strength and resistance to corrosion are important. Which two properties should the scientist prioritize when selecting elements to add to the base metal, and why?
Describe how the properties of an alloy can be tailored by changing the proportion of its components. Give an example to support your answer.
Explain, with reference to atomic structure, why adding a small amount of carbon to iron significantly changes its mechanical properties.
A sample of an alloy contains 60% nickel and 40% chromium by mass. If you have 250 g of this alloy, calculate the mass of chromium present in the sample.
Describe why alloys such as stainless steel are preferred over pure iron in the construction of bridges and buildings, considering both chemical and physical properties.
Explain how the presence of different sized atoms in an alloy affects its crystal structure and mechanical properties. Provide an example of an alloy where this effect is significant.
Explain, with an example, how the melting point of an alloy can differ from its constituent metals.
