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The simplest form of matter that has a unique set of properties
More than 100 known elements. Examples include oxygen and hydrogen.
A compound is where two elements are combined together into one whole thing
To break down compounds, a chemical change must occur.
Compounds can be broken down using chemical compositions such as heating, cooling, vapor, boiling.
Compounds in general differ from their element bases.
For Example, tap water as itself is a compound, (H20) but if you break it down, you get oxygen and hydrogen as the main elements