GCSE Chemistry – Development of the Periodic Table (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️

*** WHAT’S COVERED ***
1. Dmitri Mendeleev’s contribution to the periodic table
* Its development in the mid-19th century
* Prediction of new elements
2. Basic structure and interpretation of the periodic table
* Arrangement by increasing atomic number (number of protons)
* Understanding information in element boxes (nuclear symbol, atomic number, mass number)
3. Organisation into periods and groups
* Periods as horizontal rows showing repeating property patterns
* Groups as vertical columns with elements sharing similar chemical behaviours
* Link between group number and outer shell electrons
4. Overview of specific element groups
* Group 1 (Alkali Metals) and their reactivity
* Group 7 (Halogens) and their reactivity
* Group 0 (Noble Gases) and their unreactive nature
5. Distinction between metals and non-metals
* The zigzag line as a separator
* Introduction to transition metals
6. Common variations in how periodic tables are displayed

*** CHAPTERS ***
0:00 Introduction
0:32 Element Symbols, Atomic and Mass Numbers
1:20 Periods
1:38 Groups
2:20 Outer Shell Electrons and Group Behaviour
3:00 Group 1 Elements: Alkali Metals
3:37 Group 7 Elements: Halogens
3:48 Group 0 Elements: Noble Gases
4:22 Metals and Non-Metals
4:41 Transition Metals
5:01 Variations in Periodic Table Layouts

*** PLAYLISTS ***

#GCSE #Chemistry #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE