Question

decide whether each sketch shows a sample of an element, a compound, or a mixture.

Explanation:

• Substance X: All the particles are the same compound (composed of two different - colored atoms bonded together).
• Substance Y: All the particles are the same compound (composed of two different - colored atoms bonded together).
• Substance Z: There are two types of particles. One type is a di - atomic molecule (two same - colored atoms) and the other is a compound (two different - colored atoms). So it is a mixture.
• Substance T: All the particles are the same di - atomic element (two same - colored atoms).

Answer:

Substance X: compound, Substance Y: compound, Substance Z: mixture, Substance T: element