What is the position of lanthanides in periodic table?

actinides are also accommodated within this system, and element 114 falls naturally below lead in Group 14. 1. INTRODUCTION. The position of the lanthanide elements in the periodic table was a serious problem from the earliest statement of the Peri- odic Law by Mendeleyeff in 1869 (Brooks, 2002), and the dif-. read more

Lanthanides (14 elements from 58Ce – 71 Lu ) have been placed below the periodic table in a horizontal row ( Elements of third group & sixth period ). Actinides (14 elements from 90 Th – 103 Lr ) have been placed below the periodic table in a horizontal row ( Elements of third group & seventh period ). read more

57th element Lanthanum was originally placed in the 6th period (line) and 3 group ( column) of the table. Later chemists discover a lot of elements that must be inserted between Lanthanum and the following Hafnium. read more

The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties, whose structure shows periodic trends. Generally, within one row (period) the elements are metals to the left, and non-metals to the right, with the elements having similar chemical behaviours placed in the same column. read more