Elements, Compounds, and Mixtures

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, which can be of the same or different elements.

Front

Can a molecule be made of the same kind of atoms?

Back

Yes, a molecule can be made of the same kind of atoms, such as O2 (oxygen gas).

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

How can compounds be separated?

Back

Compounds can only be separated by chemical means, not by physical methods.

Front

What is an element?

Back

An element is a pure substance that 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 by chemical means.

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

What is an example of a compound?

Back

An example of a compound is salt (NaCl), which is made of sodium and chlorine.

Front

What is an example of an element?

Back

An example of an element is gold (Au), which consists of only gold atoms.

Front

What is the difference between a compound and a mixture?

Back

A compound is made of different elements chemically bonded, while a mixture contains different substances that are not chemically bonded.