Classification of matter

What is the simplest form of matter that cannot be broken down into simpler substances by chemical means?

• Compound

• Element

• Mixture

• Solution

Which of the following is a compound?

• Oxygen

• Water

• Iron

• Helium

Identify the type of mixture: A salad with lettuce, tomatoes, and cucumbers.

• Homogeneous mixture

• Heterogeneous mixture

• Compound

• Element

Which of the following diagrams best represents an element?

• 1

• 2

• 3

• 4

Which of the following is a physical property?

• Flammability

• Reactivity with acid

• Melting point

• Ability to rust

Which of the following is a chemical property?

• Density

• Boiling point

• Solubility

• Reactivity with oxygen

A student observes a substance that is uniform throughout and cannot be separated into simpler substances by physical means. What type of matter is this?

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture

A homogeneous mixture is the same thing as...

• a solution

• a heterogeneous mixture

• a compound

• an element

What are mixtures?

• different materials placed together but keeping their own properties

• a mixture in which substances spread out evenly and will not settle

• the degree to which a material will dissolve in another substance

• the substance in a solution that has the greatest amount

• the substance in a solution that has the least amount

Which particle diagram could represent Br₂?

• A

• B

• C

• D