HON CHEMISTRY: Here are the notes on the elements of the s-block – everything from bananas, to bones, signal flares to street lights. Don’t forget to pay close attention to properties (physical & chemical), occurence, and uses. If you want to see some really interesting videos on some of the more “explosive” elements, check out this link – http://periodicvideos.com/
And guess what I found out today – chalk isn’t really chalk! I mean, just like pencil lead isn’t really lead, blackboard chalk isn’t made of calcium carbonate anymore, it’s made of calcium sulfate (commonly called gypsum) instead. Who knew!