Periodic Table Trends

The periodic table is a carefully organized table, with elements categorized by their similar properties. Trends help us understand the periodic table better, because you are able to see the pattern in the rows and columns of the periodic table!

There are different properties to view trends. For example:

• Melting and boiling point

• Ionization energy

• Electronegativity

• Atomic radius

                                                             Melting and boiling point

The trend is:

-boiling/melting point increases from left to right

-Boiling/melting point decreases going from up to down

-the elements in the centre of the table have the highest boiling and melting point (hence the red colour in the middle!)
-noble gases have the lowest boiling/melting point

 

Ionization Energy

The trend is:

-ionization increases going left to right

-ionization decreases going down

-noble gases have high ionization energy   

Electronegativity

The trend is:

-electronegativity increases going from left to right

-electronegativity decreases going up to down

As you can see, the trends prove to us that the elements on the periodic table have been placed there for a specific reason!

Want to learn more?

http://www.youtube.com/watch?v=h7XWqwgZII0

http://www.youtube.com/watch?v=CHHy2ex0dw4