1. Nomenclature

2. History of Chemistry
Middle Ages – people believed there were only 4 elements:
Water
Air
Fire
Earth
(WAFE – to remember this)

3. Naming & Classifying H – Hydrogen He – Helium Pb – Lead Au - Gold
Berzelius - created a better system for symbols:
Dalton: Berzelius:
H – Hydrogen
He – Helium
Pb – Lead
Au - Gold

4. Naming & Classifying Rules for symbols:
1 - first letter of the name of element written in a CAPITAL letter. ex - Hydrogen ---- H
2 - if the letter is already used add the second letter but in lower case. ex - Helium ---- He
3 - often the Latin name is used rather than the English name; ex - silver ---- argentum - Ag

5. Ordering Elements Non-metals Metals
All elements are ordered - Periodic Table:
Metals
Non-metals

6. Ordering Elements All elements are ordered ---- Periodic Table:
Periods:
- rows
- become less metallic from left to right
- atomic mass generally increases from left to right
- atomic number increases from left to right

7. Nomenclature
Go to
Naming Compounds