Element, Compound, Mixture

Front

What is a molecule?

Back

A molecule is formed when two or more atoms bond together. It can consist of the same or different elements.

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.

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

Give an example of a compound.

Back

An example of a compound is sodium chloride (NaCl), commonly known as table salt.

Front

What distinguishes a compound from a mixture?

Back

A compound has a fixed composition and properties, while a mixture retains the individual properties of its components and can vary in composition.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O, which indicates it is a compound made of hydrogen and oxygen.

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 bonded together.

Front

What type of substance is formed when sugar is dissolved in water?

Back

When sugar is dissolved in water, a mixture is formed.

Front

What is the term for a substance made of only one type of atom?

Back

The term for a substance made of only one type of atom is an element.