Extraction of metals
8 flashcards to master Extraction of metals
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What is an alloy?
An alloy is a mixture of a metal with other elements. These elements can be other metals or non-metals. Alloys are often harder and stronger than pure metals.
Give an example of an alloy containing copper, and its constituent element.
Brass is an alloy made from copper and zinc. By mixing copper and zinc, you create a material more suitable for some applications than pure copper.
Give an example of an alloy containing iron, and its constituent elements.
Stainless steel is an alloy made from iron, chromium, nickel, and carbon. The addition of these elements makes it resistant to rusting.
Why are alloys often more useful than pure metals?
Alloys are often harder and stronger than the pure metals they are composed of. This makes them more suitable for certain applications.
Explain why alloys are harder and stronger than pure metals in terms of their structure.
Alloys have atoms of different sizes disrupting the regular arrangement of atoms. This means the layers of atoms can no longer easily slide over each other, making the alloy harder and stronger. The different sized atoms prevent easy movement.
Explain the purpose of adding chromium to steel to make stainless steel.
The chromium reacts with oxygen to form a thin layer of chromium oxide on the surface of the steel. This layer protects the iron from rusting (oxidation).
Describe one specific use of stainless steel and explain why it is suitable for that use.
Stainless steel is used in cutlery because of its hardness and resistance to rusting. The hardness means it can withstand repeated use, and resistance to rusting ensures it stays clean and hygienic.
Name one property that alloys have over their pure metal counterparts
Alloys are often stronger and harder than their pure metal counterparts. This makes them useful in a variety of different applications
Key Questions: Extraction of metals
What is an alloy?
An alloy is a mixture of a metal with other elements. These elements can be other metals or non-metals. Alloys are often harder and stronger than pure metals.
Name one property that alloys have over their pure metal counterparts
Alloys are often stronger and harder than their pure metal counterparts. This makes them useful in a variety of different applications
About Extraction of metals (9.3)
These 8 flashcards cover everything you need to know about Extraction of metals for your Cambridge IGCSE Chemistry (0620) exam. Each card is designed based on the official syllabus requirements.
What You'll Learn
- 2 Definitions - Key terms and their precise meanings that examiners expect
- 3 Key Concepts - Core ideas and principles from the 0620 syllabus
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After mastering Extraction of metals, explore these related topics:
- 9.2 Reactivity series - 12 flashcards
- 9.4 Uses of metals - 10 flashcards
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