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

How many oxygen atoms are in one molecule of carbon dioxide (CO₂)?

Back

2

Front

What does a chemical formula represent?

Back

A way of expressing information about the atoms that are in a chemical compound.

Front

What do chemical symbols represent?

Back

Elements.

Front

What is the chemical formula for sodium sulfate?

Back

Na₄SO₄

Front

How many atoms of sodium are in Na₄SO₄?

Back

4

Front

How many atoms of sulfur are in Na₄SO₄?

Back

1

Front

How many atoms of oxygen are in Na₄SO₄?

Back

4

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.