Painless Learning Subtraction Tables Placemat - Large Waterproof & Reusable Math Practice Mat for Kids - Perfect for Homework, Dining Table, or Classroom Use

I won't list all of the features of the periodic table since there is a picture of what is included on the chart, but I will highlight my favorite aspects which I think would be most informative to others.This gets 5 stars because of its durability, size, information organization, and usefulness.The size of the periodic table of elements is approximately the size of a dinner place mat. It's a perfect size in my opinion, because it is big enough to see everything clearly while not too cumbersome to handle. I reference this while typing and reading and I have no problem holding it up and setting it aside repeatedly.The periodic table is very laminated. I say 'very' because it feels like it's been laminated 5 times and there are no uneven corners or bubbles. I am not afraid of it peeling or spilling anything on this, simply because it feels so solid and well-constructed.*I just noticed that it says 'PAINLESS LEARNING PLACEMATS' in small print on the corner.The information is very well-organized. I cannot express in words how much this simple chart has helped me with my online chemistry course. I have to look at the table of elements constantly for group numbers and masses, and going back and forth between tabs on my browser was very time consuming and, quite frankly, irritating. This chart has saved me so much hassle, and I love the fact that everything is color coordinated. I know which groups are noble gasses, nonmetals, transition metals, ect... just based on the color.Truthfully, if I lost mine and the only replacement available was $30, I would purchase it without even thinking. That's how much use I have gotten out of this. But luckily for all of us, this chart--including shipping--is available for only $4!!If you're taking a chemistry course, this is a MUST. It will save you the hassle of flipping to the front of your chemistry book a million times or trying to make out the small letters on your computer screen.I normally don't rave about products this much, but everything I have said is genuine.5/5 LOVE IT!