1. Organization and Trends
Periodic Table
Organization and Trends

2. Periodic Trends
If you look at the Periodic Table, you will notice several trends… take a look at it now (pg. 172 in your text) and see if you can notice any

4. Color-coded to show similar elements
Alkali metals Ex: Sodium (Na)
Shiny, soft, silvery, highly reactive metals
Alkaline earth metals Ex: Calcium (Ca)
Shiny, silvery-white, somewhat reactive metals
Transition metals Ex: Copper (Cu)
Hard, high BP and MP, barely reactive metals
Halogens Ex: Flourine (F)
Highly reactive non-metals
Noble gases Ex: Helium (He)
Odorless, colorless, very non-reactive non-metals

5. Atomic number increases LR, top to bottom

6. Periods are the rows of elements

7. Groups are the columns that go top bottom

8. Metal elements decrease in reactivity from LR; Non-metals increase in reactivity from LR
Less Reactive 
Most Reactive R  LR
(Halogens are very non-reactive, and are not shown here)
Most Reactive  Least Reactive |
Least  Most
Reactive Reactive

9. Organization Summary
Elements are listed by their atomic number from 1 – 118 from LEFT to RIGHT, top to bottom
PERIODS = the rows that go from LR
Group/ Family = the columns that go from TOP BOTTOM
Reactivity ranges from very reactive (L side) non- reactive (R side) for both metals and non-metals

10. Element’s state of matter
Elements can exist in various states of matter (solid, liquid, gas)