TED-Ed, which seems to me to be getting better all the time, has just created an “interactive periodic table with a video for every element.”

Here’s how they describe it:

If you’ve ever taken a chemistry class, you know that memorizing all of the elements and understanding their properties can be difficult! To help provide a study aid, TED-Ed collaborated with Brady Haran, best known for his YouTube channel Numberphile and his extensive video coverage of the periodic table, to create a clickable periodic table with videos on every element.