Pediodic table contest

As you know we have changed the subject in Science and we are now studying units about Chemistry. So I suggest that our new theme should be The Periodic Table. 

You have the information about the Periodic Table contest by clicking here

Chemical reactions

In this video you can see reactions between alkali metals and water.  Pay attention to the narrator and try to follow the explanations.  Don't use subtitles, they are wrong.

Obviously it is NOT recommended to do this at home.