1. “The Ultimate Cheat Sheet”
The Periodic Table
“The Ultimate Cheat Sheet”

2. Organization of the elements
The elements go in atomic number order from left to right.
As we go down a column the elements get more massive.

3. Groups
Groups of elements are arranged vertically on the periodic table.
Elements in the same group all behave similarly because they have the same number of valence electrons.

4. Periods Periods are horizontal rows on the periodic table.
As you go across the row from left to right the elements have more electrons.
In a given period all atoms have the same # of energy levels, but not the same # of electrons in the energy levels.

5. Families Families are similar to groups Some examples of families are:
Noble Gases
Halogens
Alkali Metals
Alkaline Earth Metals
Transitions metals
Notice that not all transition metals fall into one group.

6. Metals, Non-metals & Metalloids
The periodic table can be divided into three sections.
Metals
Located on the left and center
Metalloids
Located along the staircase in the upper right corner
Non-Metals
Located to the right of the staircase (basically the upper right hand side).

7. Properties of Metals Ductility – ability to be drawn into a wire
Malleability – ability to be pounded into a sheet
Luster or shine
Ability to conduct heat
Ability to conduct electricity
Usually a solid at room temperature
Tend to form positive ions
Gives away electrons in chemical reactions

8. Properties of Non-Metals
Some are gases at room temperature
Forms negative ions
Receives electrons in chemical reactions
Brittle
Non-conductor

9. Metalloids
Has properties of both metals and non-metals.