Elements and Compounds

Front

What is an element?

Back

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

Front

What is a compound?

Back

A substance formed when two or more elements chemically bond together.

Front

What is a chemical symbol?

Back

A one or two-letter notation used to represent an element, e.g., O for Oxygen.

Front

What is the smallest unit of a compound?

Back

Molecule.

Front

What does the chemical symbol 'H' represent?

Back

Hydrogen.

Front

What does the chemical symbol 'Na' represent?

Back

Sodium.

Front

What is the chemical formula for water?

Back

H2O.

Front

What elements make up carbon dioxide (CO2)?

Back

Carbon and oxygen.

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 the chemical symbol for oxygen?

Back

O.