Chemical Symbols
 International letter abbreviations for the elements.
 Represented by:
o A capital letter
OR
o A single capital letter, followed
by a lower case letter
For Example:
The chemical symbol for:
Oxygen =
Sodium =
Silver =
All chemical symbols can be found on the modern Periodic
Table of Elements!
Chemical Formulas
 A combination of two or more chemical symbols.
 Letters represent the elements.
 Numbers (in subscript) reprecent the number of
atoms of the element directly to the LEFT of the
number.
For Example:
Water =
Chemical
Symbol
Name of
Element
Number of
Atoms
Name of
Element
Number of
Atoms
Sugar =
Chemical
Symbol
Activity:
For each compound, state the chemical symbol of the
element, the names of the individual elements and the
number for each atom.
1. CaCO3
Chemical
Symbol
Name of
Element
Number of
Atoms
Name of
Element
Number of
Atoms
Name of
Element
Number of
Atoms
2. NaNO3
Chemical
Symbol
3. Fe2O3
Chemical
Symbol