PL Table - Version 4.50 This Periodic Table is an excellent tool for both s tudents and serious researchers. It has over 20 types of data on each element and all known isotopes in cus tomizable, user-expandable tables. All sixteen nume ric data types (plus any user-added data) can be corel ated in particle or line graphs. Includes a powerf ul chemical equation balancer that can solve the most co mplex organic reactions and calculate molecular weights and amounts of reagents