1. Chemical Names and Formulas
Overview
•Metals and Non-Metals
•Ions and Ionic Charges
•Types of Compounds
•Systematic Names
-Writing Names and Formulas

2. Metals and Nonmetals Stairway Of Division on Periodic Table
C, P, Se, I, Rn and to the right are non- metals
B, Si, As, Ge, Sb, Te, At are metalloids
All others are metals

3. Ions Cations Positively Charged Atoms i.e. Na+ Anions
Negatively Charged Atoms
i.e. Cl-

4. TYPES OF COMPOUNDS Ionic Compounds Molecular Compounds
Ionic means a metal and a non-metal (or cation and anion)
These elements are NOT attached
Writing Formulas
• charges must balance so
compound charge is neutral.
Molecular Compounds
• composed of molecules in which elements share electrons.
• usually composed of 2 nonmetals.
• these elements are attached

5. CHEMICAL FORMULAS Definition: i. e. NaCl
shows the kind and numbers of atoms in the smallest representative unit of the substance.
i. e. NaCl

6. WRITING FORMULAS AND NAMING IONIC COMPOUNDS
Writing Formulas from Names
• 1st word = CATION
• 2nd word = ANION name
with ide ending.

7. IONIC COMPOUNDS
NaBr
MgF2
Sodium Bromide
Magnesium Fluoride

8. IONIC COMPOUNDS K + Cl- -> KCl Al3 + O2- -> Al2O3
Potassium Chloride
Aluminum Oxide
• notice ending of name is ide!
K + Cl- -> KCl
Al3 + O2- -> Al2O3

9. Polyatomic Ions
Definition: tightly bound groups of atoms that behave as a unit and carry a charge.
Example: SO32-, NO2-, ClO2-

10. Writing Formulas and Naming Compounds with Polyatomic Ions
Ca2 + CO > CaCO3
Ca(NO3)2
Calcium Carbonate
Calcium Nitrate

11. Naming with Transition Metals
First word = CATION
Second word = ANION
You need to determine what charge
is on the transition metal if more
than one exists.

12. Naming Transition Metals
Copper (I) Oxide
Cu2O

13. Writing Formulas with Transition Metals
FeCl3
Cu2O
FeCl2
Iron (III) Chloride
Copper (I) Oxide
Iron (II) Chloride

14. MORE ABOUT NAMING COMPOUNDS
Your ability to name compounds and write formulas hinges on your ability to recognize whether a compound is Ionic or Molecular.

15. Naming Molecular Compounds
Prefixes are used to show how many atoms are present in each molecule.
mono, di, tri,tetra, penta, hexa, hepta, octa, nona, deca

16. Writing Molecular Compounds
S4N2 
Tetrasulfur Dinitride
CO2 
Carbon Dioxide
• No mono prefix is used on first element
• Di means two oxygen atoms

17. Naming Molecular Compounds
(prefix + element name + root -ide)
* No mono prefix is used on first element
* The Greek prefixes for 1 through 8 are:
mono-, di-, tri-, tetra-, penta-, hexa-, hepta-, octo-
i. e. CO Carbon Dioxide
i.e. N2O Dinitrogen Monoxide
i.e. PCl Phosphorous Trichloride