1. By: Alex Pohl

2.  Alkali Metal  So soft that it can be cut with a knife  Very reactive and flammable  Lightest metal  Symbol: Li  Atomic number: 3  When mixed with oxygen it turns a silvery grey

3.  Alkaline-Earth Metals  Less reactive than Alkali Metals  Combine with other elements to form compounds  Two magnesium compounds are commonly used to treat minor medical problems.

4.  Transition Metal  Generally unreactive  Some transition metals can form up to 4 different ions  Only metal that is golden  A single ounce of gold can be stretched into a gold thread 5 miles long

5.  Part of the Boron family  Has 3 valence electrons  Boron is used in detergents  May react with other elements to form +3 cations

6.  Part of the Carbon family  This family contains 4 valence electrons  Sometimes found free in nature  Lead is a soft metal  Used to create yellow paint

7.  Part of the Nitrogen family  Symbol is PB  Has 5 valence electrons  Chemical symbol is Sb

8.  Part of the Oxygen family  Has 6 valence electrons  Elements in this family may react with other elements to gain 2 electrons to form a -2 charge  Oxygen is the most common element in the earth’s outer layer

9.  Part of the Halogen family  This family has 7 valence electrons  This family reacts most readily with alkali metals to form salts  Fluorine is used in toothpastes, insecticides, and some plastics

10.  Part of the Noble Gas family  Has 8 valence electrons in the outer most shell  Helium is the second noble gas  It does not burn and is used in balloons and blimps

11.  Part of the Lanthanides and Actinides  Begins with the element lanthanum  Atomic number is 57  Chemical symbol is Ho  Some lanthanides are used in the production of steel and glass

12.  Part of Lanthanides and Actinides  Begins with actinium  Atomic number is 89  All of these are radioactive  They give off high energy particles

13.  Not in any family  Chemical symbol is H  Atomic number is 1  Hydrogen is colorless, odorless, and non-toxic  The most common isotope of hydrogen is protium