Atoms, Molecules, Elements, Compounds

Front

What is an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a compound?

Back

A substance formed when two or more different types of atoms bond together.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the difference between an atom and a molecule?

Back

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

Front

What is water (H2O)?

Back

A compound made of two hydrogen atoms and one oxygen atom.

Front

What are the three states of matter?

Back

Solid, liquid, and gas.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.