12/10 - Notes: Part 5: Groups of the Periodic Table

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In the periodic table, horizontal rows are called . There are a total of

Elements in the same horizontal row have the same number of

In the periodic table, vertical columns are called . There are a total of

Elements in the same have similar physical and chemical properties.

Elements in the same vertical column have the same number of in their outer level

There are 3 different types of elements: , and

Metals are found on the side of the periodic table. Nonmetals are mostly on the side. The narrow stair-step region contains the .