Elements and Compounds

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in fixed proportions.

Front

What is the symbol for hydrogen?

Back

H

Front

What is the symbol for oxygen?

Back

O

Front

What is the chemical formula for water?

Back

H2O

Front

How many hydrogen atoms are in one molecule of water?

Back

2

Front

What is the symbol for sodium?

Back

Na

Front

What is the symbol for chlorine?

Back

Cl

Front

What is the chemical formula for carbon dioxide?

Back

CO2

Front

How many oxygen atoms are in one molecule of carbon dioxide?

Back

2