Chemical Nomenclative

Chemical Formulas 

• Be aware of the difference between ion and compound formulas

Multivalents Ions

• Same elements can form more than one ion
• the top number on the periodic table is more common
• IUPAC uses roman numerals in parenthesis to show the charge
• Classical system uses Latin names if the element and the suffixes ic (Larger charge) and ous (Smaller charge)

* Latin names

1. Ferr - Iron
2. Cupp - Copper
3. Mercur - Mercury 
4. Stann - Tin
5. Aunn - Gold 
6. Plumb - Lead 

Complex Ions

• Complex ions are larger groups of atoms that stay together during a chemical reaction
• Almost all are anions (Negative charge)

 Hydrates

• Some compounds can form lattices that bond to water molecules 
• These crystals contain water inside them which can be released by heating
• To name hydrates

1. Write the name of the chemical formulas
2. Add a prefix indicating the number of water molecules (mono=1, di=2, tri=3)
3. Add the hydrate after prefrix

Naming Acids and Base

• Hydrogen compounds are acid
• Hydrogen appears first in the formula unless it is part of polyatomic group
• If there is OH in the formula it is a base