Elements vs Compounds

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and gold (Au).

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together. Examples include water (H2O) and sodium chloride (NaCl).

Front

What is the difference between an element and a compound?

Back

An element is a single type of atom, while a compound consists of two or more different types of atoms bonded together.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. Elements and compounds are both pure substances.

Front

What is the chemical formula for water?

Back

H2O

Front

What is the chemical formula for sodium chloride?

Back

NaCl

Front

What is baking soda?

Back

Baking soda is a compound known as sodium bicarbonate, with the chemical formula NaHCO3.

Front

Is oxygen (O2) an element or a compound?

Back

Oxygen (O2) is an element because it consists of only one type of atom.

Front

Is carbon dioxide (CO2) an element or a compound?

Back

Carbon dioxide (CO2) is a compound because it is made up of two different elements: carbon (C) and oxygen (O).

Front

What does the term 'chemical bond' refer to?

Back

A chemical bond is the force that holds atoms together in a compound. There are different types of bonds, including ionic and covalent bonds.