Atoms are the smallest pieces of matter.Everything is made of atoms.

This famous photo was taken of individual atoms moved into place to write IBM’s name

Atoms

More than one atom bonded together

O2

Br2

Molecule

Image: Mstroeck

The most basic type of chemical substance

The Periodic Table of the Elementsis a list of all the elements

If it’s on the periodic table, it’s an element!

Element

More than one element bonded together◦ Carbon dioxide (CO2)

◦ Water (H2O)

Compounds

Water – H2OImage: Jecowa

Carbon dioxide – CO2Image: GarciaGerry

More than one kind of substance mixed together

They are NOT bonded together

◦ Air (Oxygen, Nitrogen, Carbon dioxide))

◦ Seawater (Sodium Chloride and H2O)

Mixture

Author: howdoyouturnthison

Mixtures

Homogeneous Heterogeneous

Mixtures

Homo = SAME

The mixture is the same all the way through

Homogeneous mixture

Salt and water solution

Hetero = DIFFERENT

The mixture looks different.

Heterogeneous mixture

Trail mix

Image attributions are to authors publishing images on Wikimedia Commons