Subject 24 · Atomic Physics
Chapter 24
Atomic Physics
Follow discrete atomic energy into line spectra, then enter the nucleus for decay, half-life, binding energy, particle structure, and the exponential calculus of radioactivity.
Build atomic physics one idea at a time.
Start with the foundations, then explore advanced ideas and calculus at the depth your course needs.
6 of 6 lessons
Discrete Energy & Spectra
Use energy ladders, photon transitions, and line spectra as elemental fingerprints.
Radioactive Decay
Balance alpha, beta, and gamma processes and identify what leaves the nucleus.
Half-Life & Activity
Connect random individual decay with predictable population curves.
Nuclear Reactions & Binding Energy
Calculate mass defect and read the binding-energy curve.
The Structure of Matter
Organise quarks, leptons, exchange particles, and conservation laws.
Atomic Calculus
Solve the decay differential equation and integrate activity.
Change one variable. Watch the physics respond.
Explore N = N₀·2⁻ᵗ/ᵀ½, then take the idea into the full lessons.
Model radioactive decay
Initial sample fixed at 1000 nuclei. The smooth curve is an expectation for a large sample; individual decays remain random.
Everything around the chapter, in one place.
Keep building with practice, classroom presentations, formulae, and a game that puts these ideas to work.
Exam practice
Questions, guided reasoning, and exam-style problem solving.
Browse exam questions →Formula toolkit
Keep the key relationships and their units close to hand.
Review formulae →Members · Classroom presentationClassroom slides
Reveal lesson ideas, examples, and checks in full-screen classroom mode.
Open slides →Lesson files
Find downloadable teaching resources and worksheets in the library.
View files →Half-Life Heist
N = N₀e⁻ˡᵃᵐᵇᵈᵃᵗ. Call when a stochastic sample will reach its target count, then watch the jagged truth.
Play the free chapter game →See it. Read it. Work it.
Connect diagrams to physical relationships and exam reasoning.
Explore diagrams →Guided support
Ask for a hint, check your reasoning, or explore a similar problem.
Ask GioAI →Key ideas to remember
Move without losing your place.
Extra challenging questions
Take the ideas further with course-specific extension questions, supplied-data graphs and worked solutions.