Multiple choice

What is the most abundant metal in the earth's crust?

  1. Magnesium

  2. Calcium

  3. Iron

  4. Aluminium
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D Correct answer
Explanation

Aluminium is the most abundant metal in Earth's crust, constituting about 8% of the crust's total weight. It's a lightweight, silvery-white metal with excellent corrosion resistance. Aluminium is never found in pure form in nature but exists in compounds like bauxite ore, which is the primary source for commercial aluminium extraction.

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