Group 2, the alkaline earth metals

Revise by topic

Every AQA 7405 spec section on its own page — the topic on one screen, the marks examiners report students losing, exam-style drills with mark schemes, and the tools that train it.

Mechanism Lab

Draw every AQA A-level organic mechanism yourself — the curly arrows, one step at a time — with instant mark-scheme feedback. Learn, Practice and Exam modes.

Recall Drills

Type each answer from memory, then check it against the mark scheme — retrieval practice that fixes recall far better than flipping a card. Available on every flashcard deck.

Mechanism Questions

Every curly-arrow step from every AQA organic mechanism as a drill — draw the arrows yourself, filtered by topic, mechanism or difficulty, or fired off as a shuffled quiz.

Ion Colour Tables

Every AQA 3.2.6 colour on one page — aqua ions, hydroxide precipitates, ligand swaps and the oxidation-state ladders — with a tap-to-reveal test mode.

Isomerism

Structural, E/Z and optical isomerism made clear — the exact condition each type needs, with worked examples.

Molecular Shapes

Every VSEPR shape and bond angle on one page — linear to octahedral — plus the lone-pair rule behind NH₃ (107°) and H₂O (104.5°), with a tap-to-reveal recall drill.

Functional Groups

Every organic functional group to recognise and name — structure, suffix/prefix and an example, with a tap-to-reveal recall drill.

Mole Calculations

Every amount-of-substance equation on one page — mass, concentration, gas volumes, the ideal-gas equation, percentage yield and atom economy — with a tap-to-reveal recall drill.

Calculations (self-mark)

The AQA Chemistry calculations that lose the most marks — GCSE moles, titration, reacting masses, % yield and atom economy, plus A-level Kc, pH, calorimetry and the ideal gas equation — each a worked exam question you mark against a real C1/M1/A1 scheme.

Mole Calculation Trainer

Drill mole calculations against the clock — moles from mass, mass from moles and concentration, with real molar masses and instant marking.

Reagents & Conditions

The whole organic reaction map — every functional-group conversion with its reagents, conditions and reaction type, plus a tap-to-reveal recall drill.

Spectroscopy

IR, mass spec and ¹H NMR on one page — the data-booklet values, the fragment losses, and how to read a spectrum, with a recognition drill.

Test-Tube Tests

Every functional-group and ion test with the exam-accepted observations — bromine water to Tollens' — with a tap-to-reveal test mode.

Flashcards

460+ spec-point chemistry cards with spaced-repetition review — flip, self-grade, and they come back the day you'd start to forget them.

Synthesis Navigator

Drill every synthesis route by functional group, restricted to what you've covered so far — plus a start-to-target route planner, one reagent at a time.