How is the Modern Periodic Table Organized?
The common modern periodic table is organized by atomic number (thanks, Mosley!).
From there we classify metals vs. non-metals (and metalloids) and group elements into Families like Alkali Metals, Halogens, and Noble Gases.
Groups vs. Periods
- Groups are the COLUMNS (vertical, up-down)
- Periods are the ROWS (horizontal, side-to-side)
Metals vs. Non-Metals
The first big grouping within the modern Periodic Table is whether an element is a metal, non-metal, or metalloid (semi-metal).
Elements in the same Group or Family tend to have the same general characteristics. These are the Groups you need to know:
- Alkali Metals (Group 1A)
- Alkaline Earth Metals (Group 2A)
- Halogens (Group 7A)
- Noble Gases (Group 8A)
Here are some other links to help you get aquainted with all the Groups/Families:
- This link will take you to a database of all different styles of Periodic Tables (some are pretty bizzare!)
How much do you need to know about the Periodic Table is Organized?
- Know the difference between Groups (columns) and Periods (rows).
- Know where to find metals, non-metals and metalloids
- Know the defining characteristics of metals and non-metals
- Know the location, Group A numbers for, and key properties of the Alkali Metals, Alkaline Earth Metals, Halogens, and Noble Gases.