Physics

Please select the appropriate area below:

GCSE AQA Physics 4.4: Atomic Structure

Below we have separated this unit into 4 easy segments but first lets look at the overall key objectives to remember these in an easy pictorial format




Lesson 1: The Structure of the Atom & Historical Models

Learning Objectives:
Describe the structure of the atom (protons, neutrons, electrons).
Understand the development of atomic models (Dalton → Thomson → Rutherford → Bohr → Chadwick).


Lesson 2: Isotopes and Radiation

Learning Objectives:
Define isotopes and explain how they differ.
Describe the nature of alpha, beta, and gamma radiation.
Compare their properties (penetration, ionisation, range).


 Lesson 3: Nuclear Equations and Half-Life

Learning Objectives:
Write and interpret nuclear equations for alpha and beta decay.
Understand and calculate half-life from data.


 Lesson 4: Uses, Dangers & Safety of Radiation

Learning Objectives:
Describe uses of radiation in medicine and industry.
Understand the dangers of ionising radiation and how exposure is controlled.