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HomeAQA GCSE ChemistrySubatomic particles, atomic number and mass number
AQA · GCSE · Chemistry

Subatomic particles, atomic number and mass number
Practice Questions

20 AQA GCSE Chemistry questions on Subatomic particles, atomic number and mass number, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Subatomic particles, atomic number and mass number.

Try 2 sample questions on Subatomic particles, atomic number and mass number

Question 1 · 1 mark · Difficulty 1/3

What is the relative charge of a proton?

  1. A) -1
  2. B) 0
  3. C) +1
  4. D) +2
Show answer & explanation
✓ Answer: CC) +1
A proton carries a relative charge of +1. Neutrons have no charge (0) and electrons have a relative charge of -1.
Question 2 · 1 mark · Difficulty 1/3

An atom of carbon has an atomic number of 6 and a mass number of 12. How many neutrons does it contain?

  1. A) 6
  2. B) 12
  3. C) 18
  4. D) 2
Show answer & explanation
✓ Answer: AA) 6
The number of neutrons is calculated by subtracting the atomic number from the mass number: 12 − 6 = 6 neutrons. A common error is to confuse mass number with the number of neutrons directly.
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AQA GCSE Chemistry: Subatomic particles, atomic number and mass number FAQ

How many AQA GCSE Chemistry questions on Subatomic particles, atomic number and mass number are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Subatomic particles, atomic number and mass number for AQA GCSE Chemistry, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real AQA paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for AQA GCSE students preparing for Chemistry?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Subatomic particles, atomic number and mass number practice with other Chemistry topics or even switch to a totally different AQA subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Subatomic particles, atomic number and mass number questions aligned to the official AQA GCSE Chemistry syllabus?
Every question is written against the published AQA GCSE Chemistry specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real AQA paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from AQA.
How is Subatomic particles, atomic number and mass number typically tested on AQA GCSE Chemistry papers?
Subatomic particles, atomic number and mass number appears across multiple question types on real AQA GCSE Chemistry papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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