Unit 2 Semester Test

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and carbon (C).

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. An example is carbon dioxide (CO2), which consists of carbon and oxygen.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. An example is saltwater, where the salt is evenly distributed.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the components are not uniform and can be easily distinguished. An example is a salad.

Front

Is Iron (Fe) an element or a compound?

Back

Iron (Fe) is an element.

Front

What is the definition of a mixture?

Back

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

Front

What is the difference between an element and a compound?

Back

An element is a single type of atom, while a compound is made up of two or more different types of atoms chemically bonded together.

Front

What is the chemical formula for carbon dioxide?

Back

The chemical formula for carbon dioxide is CO2.

Front

What is the state of carbon dioxide at room temperature?

Back

Carbon dioxide is a gas at room temperature.

Front

What is an example of a homogeneous mixture?

Back

An example of a homogeneous mixture is vinegar.