1.2 Elements, Compounds, and Mixtures

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically combine in fixed proportions.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is 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

When copper (Cu) and oxygen (O) combine, what do they form?

Back

They form a compound.

Front

What is the difference between an element and a compound?

Back

An element consists of only one type of atom, while a compound consists of two or more different types of atoms chemically bonded together.

Front

What is a mixture of compounds?

Back

A mixture of compounds contains two or more different compounds that are physically combined but not chemically bonded.

Front

How can you identify a compound?

Back

A compound can be identified by its fixed composition and the chemical bonds between its elements.

Front

What happens to the properties of elements when they form a compound?

Back

The properties of the resulting compound are usually different from the properties of the individual elements.

Front

Can a mixture be separated into its components?

Back

Yes, a mixture can be separated into its components by physical methods such as filtration or distillation.

Front

What is an example of a compound?

Back

Water (H2O) is an example of a compound, formed from hydrogen and oxygen.