compound
A mixture is a substance made up of two or more pure substances.
The mixture is the combination of the two or more substances.
Molecules are substances consisting two or more atoms.
mixture
A mixture.
Compounds / molecules
This is a mixture.
To identify which of the nine substances are made up of two elements, I would need to know the specific substances you are referring to. However, generally speaking, compounds such as water (H₂O) and carbon dioxide (CO₂) are examples of substances composed of two elements. If you provide the list of substances, I can give a more accurate answer.
Substances can be classified as elements, compounds, or mixtures. Elements are made up of only one type of atom, compounds are made up of two or more different elements chemically bonded together, and mixtures are combinations of two or more substances that are not chemically bonded.
The two main classifications of matter are pure substances and mixtures. Pure substances are made up of only one type of substance with specific chemical properties, while mixtures are made up of two or more substances physically combined with variable composition and properties.
2 or more substances can form a mixture or a compound. Mixtures are made up of different substances that are physically combined and can be separated by physical means, while compounds are made up of two or more different elements that are chemically bonded together in a specific ratio.
A compound substance is one that is made up of two or more elements.