Periodic table alternate version

In some versions of the periodic table, you will sec a different notation for groups, with the noble gases belonging to Group VIII, VIIIA, or VIIIB. These alternatives are given in the table printed inside the front cover. 

Activity Research periodic tables that differ from the standard periodic table on pages 156-157. List three alternate versions of the standard periodic table and describe their differences. 

The way in which the periodic system is displayed is a fascinating issue, and one that especially appeals to the popular imagination. Since the time of the early periodic tables of John Newlands, Juhus Lothar Meyer, and Dimitri Mendeleev, there have been many attempts to obtain the ultimate periodic table. Indeed, it has been estimated that within 100 years of the introduction of Mendeleev s famous table of 1869, approximately 700 different versions of the periodic table were published. These include all kinds of alternatives, including three-dimensional tables, helices, concentric circles, spirals, zigzags, step tables, and mirror image tables. Even today, articles are regularly published in the Journal of Chemi-... 

As for the lanthanide elements, the actinides (actinium to nobelium) are placed as a set of 14 elements in the separate f block, with element 104, lawrencium, being the first member of the fourth transition series. Alternative versions of the Periodic Table have actinium as the first member of the fourth transition series, and have lawrencium as the last of the actinide elements in the series of 14 from thorium to lawrencium. Lawrencium, as does lutetium, possesses a full f set of 14 electrons with a single outer d electron. Some versions of the Periodic Table dodge the above considerations and have 15 lanthanide elements, La-Lu, and 15 actinide elements, Ac-Lr, placed in the Group 3 column. The fourth transition series is unfinished, and the element with the highest Z value which has so far been synthesized is number 112. The names of the translawrencium elements Le. those with atomic numbers greater than 103) were settled in 1997 after many years of international argument. They have now been ratified by the International Union of Pure and Applied Chemistry (lUPAC), and are as shown in Table 3.5. 

---