Structure of materials
Elements
pure substance that cannot be broken down into any simpler substance
made up of only one kind of atom.
Can be found in the periodic table
Compounds
pure substance that is made up of two or more elements chemically combined together in a fixed ratio.
combined in a fixed ratio by mass.
Cannot be found on periodic table
Mixtures
made up of two or more substances that are not chemically combined together.
mixture can be mixed in any proportion.
can consist of a mixture of elements, a mixture of compounds or a mixture of both.
Cannot be found on periodic table
can be formed by combining the following through a chemical reaction:
elements with elements
elements with compounds
compounds with compounds
No chemical reaction takes place when a mixture is formed.
not chemically combined with each other.
Alloys are mixtures