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CXC · CSEC · Integrated Science

Atomic Structure
Practice Questions

20 CXC CSEC Integrated Science questions on Atomic Structure, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Atomic Structure

Question 1 · 1 mark · Difficulty 1/3

A student in a Trinidad chemistry class is asked to identify the number of protons in an atom of sodium (Na). The atomic number of sodium is 11. How many protons are present in one atom of sodium?

  1. 11
  2. 12
  3. 22
  4. 23
Show answer & explanation
✓ Answer: A11
Award 1 mark for correctly identifying that the atomic number equals the number of protons. B is incorrect — 12 is the number of neutrons in sodium-23. C is incorrect — this confuses protons with total nucleons. D is incorrect — 23 is the mass number (protons + neutrons), not the number of protons alone.
Question 2 · 1 mark · Difficulty 1/3

Which sub-atomic particle has a relative charge of zero?

  1. Proton
  2. Electron
  3. Neutron
  4. Ion
Show answer & explanation
✓ Answer: CNeutron
Award 1 mark for identifying the neutron as electrically neutral. A is incorrect — protons have a relative charge of +1. B is incorrect — electrons have a relative charge of −1. D is incorrect — an ion is a charged atom, not a sub-atomic particle.
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20 questions · 25 min · free

CXC CSEC Integrated Science: Atomic Structure FAQ

How many CXC CSEC Integrated Science questions on Atomic Structure are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Atomic Structure for CXC CSEC Integrated Science, 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 CXC 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 CXC CSEC students preparing for Integrated Science?
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 Atomic Structure practice with other Integrated Science topics or even switch to a totally different CXC 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 Atomic Structure questions aligned to the official CXC CSEC Integrated Science syllabus?
Every question is written against the published CXC CSEC Integrated Science specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC 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 CXC.
How is Atomic Structure typically tested on CXC CSEC Integrated Science papers?
Atomic Structure appears across multiple question types on real CXC CSEC Integrated Science 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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