Multiple choice

Carbon dioxide is

  1. an element

  2. a compound

  3. a mixture

  4. an alloy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon dioxide (CO2) is a chemical compound because it consists of carbon and oxygen atoms chemically bonded together in a fixed 1:2 ratio. It is not an element because it can be broken down into simpler substances, nor is it a mixture or an alloy.

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