1. Chapter 12 The Periodic Table
Section 2 Grouping the Elements
( pp )

2. Alkali Metals( Group 1) Very reactive Shiny and light weight
Only found combined with other elements
One electron in the outer shell

3. Alkaline Earth Metals Group 2
Not as reactive as the alkali metals
Have 2 electrons in the outer shell

4. Transition Metals (Groups 3 to 12)
Less reactive than alkali or alkaline earth metals
Properties vary widely examples: Hg –liquid, titanium is not very reactive but iron is.
Can use 2 outer most shells/orbitals to bond with other elements

5. Groups 13 to 16 Boron Group (13) Carbon Group (14) Nitrogen Group (15)
Oxygen Group (16)

6. Halogens – Group 17 Very reactive nonmetal
Seven electrons in the outer shell
Often bond with metals
Fluorine is the most reactive
Never found uncombined in nature
Form halides-a halogen combined with another element to form a compound

7. Noble Gases – Group 18 Group 18 Have full outer shell with 8 electrons
Rarely combine with other elements
Non-reactive (inert)
Colorless
Odorless
Gases at room temperature

8. Lanthanides and Actinides
Some of the transition metals from periods 6 and 7
placed at the bottom of the periodic table to keep it from being too wide.

9. Lanthanides Follow the element lanthanum Shiny and reactive
Used to make different types of steel
Sometimes called inner transition metals

10. Actinides Follow the metal actinium Radioactive Unstable
Atoms of a radioactive element can change into atoms of a different element

11. Hydrogen
Properties do not match the properties of any single group, so hydrogen is set apart from the other elements in the table.
Reactive
Colorless, odorless
Gas at room temperature
Most abundant element in the universe