The Chemistry of Materials

Front

What is an element?

Back

An element is a pure substance that contains only one kind of atom.

Front

What is a chemical property of a substance?

Back

A chemical property is a characteristic that can only be observed during a chemical reaction, such as reactivity with hydrochloric acid.

Front

What phase are most elements in at room temperature?

Back

Most elements are solid at room temperature.

Front

What holds molecules together?

Back

Molecules are held together by chemical bonds.

Front

What is a pure substance made of only one type of atom called?

Back

A pure substance made of only one type of atom is called an element.

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 types of atoms bond 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 is a physical property?

Back

A physical property is a characteristic of a substance that can be observed without changing its chemical composition, such as color or density.

Front

What is density?

Back

Density is the mass of a substance divided by its volume.