Elements, Compounds, and Mixtures

Front

What is a heterogeneous mixture?

Back

A mixture in which the substances that make up the mixture are not evenly mixed.

Front

What is a pure substance that is a compound?

Back

A substance made of two or more different elements that are chemically bonded together, such as water (H2O).

Front

Which of the following is a molecule of a compound? H2, Cl2, NH3, F2

Back

NH3 (Ammonia) is a molecule of a compound.

Front

What defines a compound?

Back

A compound contains two or more atoms combined chemically.

Front

What are pure substances?

Back

Materials that have a constant composition and consistent properties throughout.

Front

What is the difference between elements and compounds?

Back

Elements are pure substances that cannot be broken down into simpler substances, while compounds are made of two or more elements chemically combined.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is an example of a homogeneous mixture?

Back

Saltwater is a homogeneous mixture because the salt is evenly distributed throughout the water.

Front

What is an example of a heterogeneous mixture?

Back

A salad is a heterogeneous mixture because the ingredients are not evenly mixed.

Front

What is the chemical formula for water?

Back

H2O, which indicates it is a compound made of hydrogen and oxygen.