Series

Series, or within a  techically, is a horizontal arrangement of  that tend to increase the number of s in their occupying  from left to right while they each have same number of, except for many transoganesson elements due to s. Series are named after their lightest or leftmost element but unlike family, series use the suffix ' –ide ' , e.g.  after  and boride series after. The 172-element shows 26 series in 9 periods all in different colors.