Why was it necessary to create a periodic table?
It wasn’t necessary, but it was very helpful. By arranging the elements in a periodic table, it makes it much easier to see patterns and trends in the properties of the elements. For instance, all of the elements in each column of the periodic table have similar properties because their electron configurations are related. Using the periodic table, you can predict with fairly good accuracy the properties of an element you’ve never even seen just based on where it is in the periodic table. It is a very powerful tool for chemists.