Elements, Compounds, Mixtures

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together. For example, water (H2O) is a compound made of hydrogen and oxygen.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Each substance retains its own properties. Examples include air and salad.

Front

How is sodium chloride classified?

Back

Sodium chloride (NaCl) is classified as a compound because it is made up of sodium and chloride ions that are chemically bonded.

Front

What is the chemical symbol for hydrogen?

Back

The chemical symbol for hydrogen is H.

Front

What does a mixture of atoms represent?

Back

A mixture of atoms represents a combination of different types of atoms that are not chemically bonded, such as in a mixture of elements.

Front

What is a mixture of elements and compounds?

Back

A mixture of elements and compounds contains both pure elements and compounds that are not chemically combined, allowing each to retain its properties.

Front

What is the chemical formula for ammonia?

Back

The chemical formula for ammonia is NH3.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed from two or more elements that are chemically bonded, while a mixture is a physical combination of substances that retain their individual properties.