Question

copper sulfate is made up of the elements copper, sulfur, and oxygen. which statements about these substances are true?
copper sulfate is a powdery, yellow solid, while sulfur is a blue - green metal.
copper, sulfur, oxygen, and copper sulfate all have very different properties.
copper, sulfur, and copper sulfate are all solids, but they have different properties.
copper, sulfur, and oxygen can combine to form copper sulfate, which has properties that are distinct from each of those elements.

Explanation:

• Copper sulfate is a blue - green crystalline solid, not a powdery yellow solid, and sulfur is a yellow non - metal, not a blue - green metal. So the first option is wrong.
• Copper is a metal (solid), sulfur is a non - metal (solid), oxygen is a gas, and copper sulfate is a compound. Compounds have different properties from the elements that make them up.
• Copper is a solid, sulfur is a solid, and copper sulfate is also a solid, and they have different properties.
• Copper, sulfur, and oxygen can chemically combine to form copper sulfate, and as a compound, copper sulfate has distinct properties from each of the elements.

Answer:

• Second option: Copper, sulfur, oxygen, and copper sulfate all have very different properties.
• Third option: Copper, sulfur, and copper sulfate are all solids, but they have different properties.
• Fourth option: Copper, sulfur, and oxygen can combine to form copper sulfate, which has properties that are distinct from each of those elements.