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Atomic structure
Understand the chemistry. Build a precise answer. Try it yourself.
Why should you never trust an atom?Because they make up everything.
What’s new in this test?
New answer-building guidance and targeted traps sit alongside the existing notes. Try the answer clinic, calculation checkpoints, topic recap and answer boxes. Official past-paper practice now follows the exam-style questions in all 21 sections, including four different TOF calculations. The tick-box dropdown lets you choose several subtopics and filter Notes, Videos and Questions.
Use Show new guidance to compare the notes. Your test answers and saved questions stay in this browser only. These original sample answers are for your review; they are not official mark schemes. No student accounts or progress records are connected.