Calcium carbonate is considered a compound because it is made up of two or more of what?

• A. atoms of the same type
• B. elements
• C. ions
• D. mixtures

Answer: (B)

Verified step by step guidance

1. Understand the definition of a compound: A compound is a substance formed when two or more different elements chemically combine in fixed proportions.
2. Identify what calcium carbonate (CaCO\_3) consists of: It contains calcium (Ca), carbon (C), and oxygen (O).
3. Recognize that these are different types of atoms, each representing a different element.
4. Recall that atoms of the same type form elements, while atoms of different types combine to form compounds.
5. Conclude that calcium carbonate is made up of two or more different elements chemically bonded together.