UKChO evidence desk
News & study guides
Source-led updates on UK Chemistry Olympiad results, registration, official resources and preparation practice. Dated facts are separated from evergreen study guidance.
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Bronze, Silver or No Award: How to Read Your UKChO Result and Decide Whether to Enter Again
What each 2026 band meant in a field of 17,241, a 48-hour method for finding where your marks went, and how to decide honestly whether a second entry is worth a term.
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When to Enter UKChO: Choosing Your Target Season and Building the Runway to It
Eligibility is set by the RSC and handled by your school. Readiness is yours. Five gates that decide whether an entry is worth a season, and how a calibration year works.
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UKChO Kinetics: How Rate Data Becomes Evidence for a Mechanism
Orders never come from the balanced equation. How to read rate laws out of data, get Ea from an Arrhenius gradient, and use kinetics as evidence for a mechanism.
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Answering UKChO in English: The Command Words That Decide Whether Your Chemistry Scores
Explain, deduce, suggest and account for demand different answers. How China-based students lose UKChO marks on correct chemistry, and the sentence shapes that fix it.
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UKChO Structure Questions: How to Get From a Molecular Formula to a Defensible Structure
A five-step method for UKChO structure problems: count degrees of unsaturation, triage the clues, read the supplied data, then eliminate candidates before you commit.
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UKChO 2027 Season Plan: The Entry Window, and How to Back-Plan an Autumn from a Late-January Paper
A late-January Round 1 means the work happens in the autumn term, and the entry window closes in the weeks students are least likely to be watching. A month-by-month back-plan from September, with the verified 2026 numbers as calibration.
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UKChO Calculations and Data: The Numerical Habits That Separate Silver From Gold
In 2026 Silver began at 23 marks and Gold at 38 out of 84. Most of that gap is numerical discipline: units, mole chains, logs, rounding and reading data.
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How UKChO Round 1 Is Sat, Marked and Moderated – And How to Spend the Two Hours
Round 1 is a two-hour paper sat in school, marked by your own teacher and moderated by the RSC working group. Here is how that chain should shape your answers.
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UKChO Round 2 Explained: The Four-Day Selection Weekend, the Practical Exam and the Road to IChO
Round 2 of the UK Chemistry Olympiad is a four-day residential for about 30 students: a four-hour practical, a four-hour theory paper, and a team of four.