Multiple choice

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

  1. Silicon

  2. Oxygen

  3. Phosphorus

  4. None of these

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

Oxygen is the most abundant element in the Earth's crust, and it is a non-metal. Silicon is the second most abundant element, also a non-metal, but oxygen is more abundant.