Choose the appropriate chapter from the list:

Chapter - Periodic Table of Elements
The periodic table is an arrangement of the chemical elements ordered by atomic number in columns (groups) and rows (periods) presented so as to emphasize their periodic properties. Chapter - Periodic Table of Elements presents about history of the periodic table, structure of the periodic table (part 1), as well as types of elements.

Chapter - Periods, Groups and Behaviour of the Elements
This chapter presents more about periods, groups and behaviour of the elements such as periodicity in the properties of elements, trends within a period, trends withing groups, valency, as well as chemical properties and group number