2. Ch. 2.1 - “Classifying Matter”
Elements are substances that cannot be broken down into simpler substances.

3. Ch. 2.1 - “Classifying Matter”
Matter is made of atoms which are the smallest particles that have the properties of an element.

4. Ch. 2.1 - “Classifying Matter”
An element is represented by a one or two letter chemical symbol.
Carbon – C Copper - Cu

5. Ch. 2.1 - “Classifying Matter”
Molecules are the smallest unit of a substance that exhibits all of the characteristics of that substance.

6. Ch. 2.1 - “Classifying Matter”
Compounds are substances made of atoms of more than one element bound together.

7. Ch. 2.1 - “Classifying Matter”
Every compound is unique and is different from the elements it contains.

8. Ch. 2.1 - “Classifying Matter”
Chemical formulas are the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance.
2H2O
Chemical Symbol
Subscript: # of atoms
Coefficient: # of molecules