Multiple choice

Which of the following is the most abundant metal in the earth's crust?

  1. Aluminium

  2. Iron

  3. Calcium

  4. Radium

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aluminium is the most abundant metal in the Earth's crust, making up about 8 percent of the crust by weight. Iron is the second most abundant metal.