Front

What are elements made of?

Back

One type of atom.

Front

What is a substance made up of only one kind of atom?

Back

Element.

Front

How many atoms are in the formula Al2O3?

Back

5.

Front

What are molecules?

Back

Groups of two or more atoms bonded together.

Front

What is a molecule?

Back

A group of atoms bonded together.

Front

What is an atom?

Back

The smallest unit of an element, consisting of protons, neutrons, and electrons.

Front

What is a compound?

Back

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

Front

What is the periodic table?

Back

A table that organizes all known elements by their atomic number and properties.

Front

What is a mixture?

Back

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

Front

What is the difference between an element and a compound?

Back

An element is made of one type of atom, while a compound is made of two or more different types of atoms.