| 1. It is the third most abundant element in the earth crust. |
| 2. It exists in a stable combination with other materials mainly silicates and oxides. |
| 3. It has high strength-to-weight ratio. |
A) Magnesium
B) Iron
C) Aluminum
D) Calcium
Correct Answer: C
Solution :
The properties of aluminum include: low density and therefore low weight, high strength, superior malleability, easy machining, excellent corrosion resistance and good thermal and electrical conductivity are amongst aluminum?s most important properties. Aluminum is also very- easy to recycle.
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