Molecules, Compounds, & Chemical Formulas - 6.5c

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

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 the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is made up of two or more atoms bonded together.

Front

What does the chemical formula CO2 represent?

Back

CO2 represents a molecule of carbon dioxide, which consists of one carbon atom and two oxygen atoms.

Front

How many atoms are in a molecule of water (H2O)?

Back

A molecule of water (H2O) contains three atoms: two hydrogen atoms and one oxygen atom.

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the role of electrons in atoms?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom and are involved in chemical bonding.

Front

What is a chemical bond?

Back

A chemical bond is the force that holds atoms together in a molecule.

Front

What is the difference between a molecule and a compound?

Back

All compounds are molecules, but not all molecules are compounds. A molecule can consist of the same type of atoms, while a compound consists of different types of atoms.