The elements in the periodic table are organised in order of increasing atomic number.
1.18 Organising the Elements
Students should:
1.18 understand how elements are arranged in the Periodic Table:
- in order of atomic number
- in groups and periods
1.19 understand how to deduce the electronic configurations of the first 20 elements from their positions in the Periodic Table
The modern periodic table provides a list of all the known elements categorized in increasing order of increasing atomic number.
Each row across the periodic table is known as a period.
Each column is known as a group.