1. Chemical formulas and chemical compounds
Chapter 7
Chemical formulas and chemical compounds

2. What is dihydrogen monoxide? Water! What is water made of?
Chemical names and formulas section 1 significance of a chemical formula
What is dihydrogen monoxide?
Water!
What is water made of?
2 hydrogen atoms and 1 oxygen atom
H2O!

3. Significance of the chemical formula
This is the chemical formula for octane
elements symbols
C8H18
subscript indicates subscript indicates
8 carbon atoms in a hydrogen atoms
Molecule of octane in a molecule of
octane

4. How about aluminum sulfate?
Al2(SO4)3
What elements compose aluminum sulfate
How many atoms of each element?
What do the parenthesis mean?

5. Monatomic ions
Ions formed from a single atom of one element.