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Metal Alloys (Grade 10)

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Metal Alloys

1. 
Which statement is true when two metals composed of different elements combine to form an alloy?
  1. It’s more difficult for the layers to slide over each other, so alloys are harder than the pure metal.
  2. It’s less difficult for the layers to slide over each other, so alloys are harder than the pure metal.
  3. It’s more difficult for the layers to slide over each other, so alloys are softer than the pure metal.
  4. It’s less difficult for the layers to slide over each other, so alloys are softer than the
  5. It’s less difficult for the layers to slide over each other, so alloys are softer than the pure metal.
2. 
Steel is an alloy of which of the following choices?
  1. Iron with boron
  2. Iron with carbon
  3. Iron with sulfur
  4. Iron with silicon
3. 
Brass is composed of copper and zinc, which element is the alloying agent?               
4. 
Bronze is composed of copper, zinc, and tin which of these elements is considered the parent or base metal?                   
5. 
Which statement would be true if you could see atoms arranged in an alloy?
  1. Atoms of the alloying agents are spread throughout the structure.
  2. Atoms of the alloying agents are not spread throughout the structure.
  3. Atoms of the alloying agents are centered in the left side of the structure.
  4. Atoms of the alloying agents are centered in the right side of the structure.
6. 
If the atoms of the alloying agent replace atoms of the main metal, you get what's called an interstitial alloy.
  1. True
  2. False
7. 
Steel is an example of a substitution alloy in which a relatively small number of carbon atoms slip in the gaps between the huge atoms in a crystalline lattice of iron.
  1. True
  2. False
8. 
An amalgam is the name for any alloy of                 and one or more other metals.
  1. lead
  2. silver
  3. mercury
  4. cadmium
9. 
Stainless steel is an alloy of iron and contains low levels of chromium this added element gives the steel its resistance to                         
10. 
Why is an alloy not considered a compound but a mixture?




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