What is the difference between atoms, molecules and ions?

A compound is a combination of two or more different atoms. Most molecules are compounds, but not all compounds are molecules. read more

Atoms, molecules, ions, elements and compounds are very often confused because they are all related. They are used to describe particles of matter – knowing and understanding the differences and relationships between these particles is essential to understanding what chemistry is all about but you need to think really, really small. read more

The Difference Between Atoms, Ions, Molecules and Compounds By Kevin Lee; Updated March 13, 2018 A single grain of sand contains about 2.3 x 10^19 silicon dioxide molecules. read more

Ions are atoms that have a positive or negative charge as a result of donating or accepting an electron(s). Molecules are 2 or more atoms that are chemically bonded to each other, so that there is a force of attraction between them. An atom is one single particle of an element, which is to say that it is not bonded to anything, it's all alone. read more