Question

what is a compound?
a compound is a substance made up of two or more elements
a compound is a substance made up of one kind of mixture.
a compound is a substance made up of one kind of element.
a compound is a substance made up of two or more substances that are physically combined
question 8

Explanation:

To determine the correct definition of a compound, we analyze each option:

• Option 1: A compound is defined as a substance formed by the chemical combination of two or more different elements in a fixed ratio. This matches the scientific definition.
• Option 2: A compound is not made up of one kind of mixture. Mixtures and compounds are distinct; mixtures are physical combinations, while compounds are chemical combinations.
• Option 3: A substance made of one kind of element is an element, not a compound.
• Option 4: A substance made of two or more substances physically combined is a mixture, not a compound.

Answer:

A. a compound is a substance made up of two or more elements