The periodic table is so important to our existence today because the world we live in is made up of chemicals and chemical reactions. To understand these reactions and continue to exist, we need to have the information at our fingertips and organized in an efficient way. That is what the periodic table of elements is-a fantastic way to keep our most basic and most important information organized. Chemical reactions and elements affect the way we live, in ways we sometimes forget. When was the last time you ate lead for breakfast? If you said, ‘Never.’ you’d be correct. No one eats lead because lead is poisonous to the human body. We know this and other important facts because we have our facts organized well in the periodic table, and scientists can study these important details for us and convey their findings before we make a fatal mistake. Look at this website for additional details.