Question

a student drew models for two forms of matter, matter a and matter b, as shown.
matter a matter b
images of matter a and matter b
classify the types of matter for both a and b based on their compositions, and explain why they are classified this way.
read the question carefully. then enter your answer and explanation in the box provided.

Explanation:

• Matter A: It contains two different types of molecules (black single atoms and yellow diatomic molecules). A mixture is a combination of two or more substances (elements or compounds) that are not chemically combined. Since Matter A has multiple distinct types of particles (different molecules) that are physically mixed, it is a mixture.
• Matter B: All the molecules are identical (each blue atom bonded to four black atoms, forming the same molecular structure). A compound is a substance made of two or more different elements chemically bonded in a fixed ratio, and a pure substance (element or compound) has uniform composition. Since Matter B has only one type of molecule (with consistent elemental composition and bonding), it is a compound (and a pure substance).

Answer:

• Matter A: Mixture (because it contains two or more distinct types of particles/molecules (black single atoms and yellow diatomic molecules) that are physically mixed, not chemically combined).
• Matter B: Compound (Pure Substance) (because all molecules are identical, made of two or more different elements (blue and black atoms) chemically bonded in a fixed ratio, so it has a uniform, definite composition).