ES- 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 gold (Au), oxygen (O), and iron (Fe).

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together. Examples include water (H2O) and sodium chloride (NaCl).

Front

Which of the following is an example of an element: HCl, NaCl, or Au?

Back

Au (Gold) is an example of an element.

Front

Which of the following is an element: Gold, Water, Carbon Dioxide, or Nitrous Oxide?

Back

Gold is an element.

Front

Is Iron (Fe) an element or a compound?

Back

Iron (Fe) is an element.

Front

Can compounds be broken down into simpler substances?

Back

Yes, compounds can be broken down into simpler substances, while elements cannot.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

What is the chemical formula for sodium chloride?

Back

The chemical formula for sodium chloride is NaCl.

Front

What is the difference between an element and a compound?

Back

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

Front

Give an example of a compound.

Back

An example of a compound is carbon dioxide (CO2).