Why the table is arranged this way
Why the table is arranged this way
The modern Periodic Table is arranged by increasing atomic number, which is the number of protons in the nucleus. A period is a horizontal row, and a group is a vertical column.
Step-by-step lessons on Eduqas A Level Chemistry The Periodic Table. Each one builds up to exam-style questions. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.