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

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances.

Front

What is a compound?

Back

A compound is a substance formed when two or more different types of atoms bond together chemically.

Front

What type of atoms make up a compound?

Back

A compound is made of different types of atoms.

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

Is salt (NaCl) an element or a compound?

Back

Salt (NaCl) is a compound.

Front

Which of the following represents an element: H2O, H2, NaCl, CaCO3?

Back

H2 represents an element.

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

Can a mixture be separated into its components?

Back

Yes, a mixture can be separated into its components by physical means.

Front

Give an example of a compound.

Back

An example of a compound is water (H2O).