1.  The elements of in a column of the periodic table are called groups or families.  They share similar chemical properties.  The elements of in a column of the periodic table are called groups or families.  They share similar chemical properties.

2. Group 1 – metals Called alkali metals react violently/extremely reactive Called alkali metals react violently/extremely reactive

3. Group 2 – metals Called alkaline earth metals React slowly with water or not at all/reactive Not found free in nature Called alkaline earth metals React slowly with water or not at all/reactive Not found free in nature

4. Group 3 – 12 transitition metals Bridge the gap between more reactive Group 1 & 2 metals and the less reactive elements Zig Zag line separates metals from non-metals Elements along the line are called metalloids Bridge the gap between more reactive Group 1 & 2 metals and the less reactive elements Zig Zag line separates metals from non-metals Elements along the line are called metalloids

5. Group 13 – 16 Non-metals  Many are gasses at room temperature  They tend to be dull  Poor conductors  Have properties opposite of metals  Many are gasses at room temperature  They tend to be dull  Poor conductors  Have properties opposite of metals

6. Group 13 – 16 Post-Transition Metals  Usually solid, but softer than other metals  Opague  Higher electronegativity than other metals  Usually solid, but softer than other metals  Opague  Higher electronegativity than other metals

7. Group 17 Halogens Very reactive nonmetals Not found free in nature Most reactive nonmetals Very reactive nonmetals Not found free in nature Most reactive nonmetals

8. Group 18 Noble Gases  Complete outer shell  Inert -> non reactive  Complete outer shell  Inert -> non reactive

9. Periods & Properties The elements in horizontal rows are called periods. Elements in the period all react differently. However, their properties gradually change from left to right in the table. The last element in a period is always a non reactive gas. The elements in horizontal rows are called periods. Elements in the period all react differently. However, their properties gradually change from left to right in the table. The last element in a period is always a non reactive gas.