Elements , Compounds and Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and properties throughout. Examples include elements and compounds.

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 oxygen, hydrogen, and gold.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. An example is water (H2O).

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Examples include salad and air.

Front

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances.

Front

Is table salt a pure substance or a mixture?

Back

Table salt is a pure substance.

Front

What is the difference between a compound and a mixture?

Back

A compound is made of two or more elements chemically combined, while a mixture is made of two or more substances that are not chemically combined.

Front

What is an example of a mixture?

Back

An example of a mixture is garden soil, which contains various organic and inorganic materials.

Front

Is sugar (C12H22O11) an element or a compound?

Back

Sugar is a compound.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.