Understanding Mixtures and Substances

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing its identity, such as melting point, boiling point, or color.

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to change into different substances, such as reactivity with acid or flammability.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What is a pure substance?

Back

A material that has a constant composition and properties throughout, such as elements and compounds.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means, consisting of only one type of atom.

Front

What is a compound?

Back

A pure substance formed when two or more elements are chemically bonded together in a fixed ratio.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout (e.g., saltwater), while a heterogeneous mixture has a non-uniform composition (e.g., salad).

Front

How can you separate a mixture of sand and salt?

Back

Dissolve the salt in water, then filter the mixture to separate the sand from the saltwater.

Front

What is an electron?

Back

A sub-atomic particle with a negative charge that orbits the nucleus of an atom.

Front

What is a proton?

Back

A sub-atomic particle with a positive charge found in the nucleus of an atom.