Pearson Edexcel iGCSE Chemistry 4XCH1 | Atomic Structure & Development of the Atom | Complete Lesson
Complete ready-to-teach lesson for Pearson Edexcel International GCSE Chemistry (9–1) Modular 4XCH1, covering Atomic Structure and the Development of the Atomic Model (Specification Points 1.14–1.15).
This fully editable 20-slide PowerPoint provides a structured lesson covering the fundamental ideas of atomic structure alongside how scientific understanding of the atom has developed as new experimental evidence has emerged.
Students will learn to:
define atom and molecule
distinguish between atoms and molecules using chemical formulae
describe the position, relative charge and relative mass of protons, neutrons and electrons
describe how the atomic model developed over time
understand the contributions of Dalton, Thomson, Rutherford and Bohr
link experimental evidence, including Rutherford’s gold foil experiment, to changes in the atomic model
define atomic number and mass number
determine the numbers of protons, neutrons and electrons in atoms
interpret standard atomic notation
apply atomic structure knowledge to calculations and unfamiliar examples
The lesson includes a clear visual timeline showing the progression from Dalton’s solid-sphere model through Thomson, Rutherford and Bohr to the modern atomic model, with emphasis on how new evidence led to improved scientific models.
The resource includes:
retrieval-based Do Now
clear explanations of atoms and molecules
visual molecular examples
subatomic particle summary and comparison
relative charge, relative mass and position of subatomic particles
student checkpoint activities
development of the atomic model timeline
Rutherford gold foil experiment
multiple-choice application and reasoning questions
atomic number and mass number explanations
worked examples
proton, neutron and electron calculations
structured independent practice
Mastery of Key Skills activity
complete answers for self-assessment
final exit ticket
The latter part of the lesson gives students substantial practice applying atomic and mass number relationships, including determining proton, neutron and electron numbers from nuclide notation.
Suitable for:
Pearson Edexcel International GCSE Chemistry (9–1)
Modular specification 4XCH1
Atomic Structure | Development of the Atom | GCSE/iGCSE Chemistry
First teaching | Consolidation | Revision | Intervention
Resource type: Fully editable PowerPoint
Slides: 20
Specification: 1.14–1.15
Answers included
















