Igcse Model Questions Vol1 2025 Chemistry Question 30

Practice objective / multiple choice question 30 from the 2025 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Easy Difficulty
Question 30 IGCSE_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective
Igcse Model Questions Vol1 2025 Chemistry Question 30 diagram

The diagram shows the Bohr model of an element that has 17 electrons arranged as 2, 8, 7 in the K, L and M shells respectively. (a) Identify the element. (b) Write its ground‑state electron configuration in the form \(1s^2 2s^2 2p^6 3s^2 3p^5\). (c) State the number of valence electrons and the typical charge of the ion it forms.

Answer Options

A. Argon; \(1s^2 2s^2 2p^6 3s^2 3p^6\); 8 valence electrons; charge \(0\)
B. Phosphorus; \(1s^2 2s^2 2p^6 3s^2 3p^3\); 5 valence electrons; charge \(-3\)
C. Sulfur; \(1s^2 2s^2 2p^6 3s^2 3p^4\); 6 valence electrons; charge \(-2\)
Correct Answer D. Chlorine; \(1s^2 2s^2 2p^6 3s^2 3p^5\); 7 valence electrons; charge \(-1\)
Correct Answer
D
Correct Option:
Chlorine; \(1s^2 2s^2 2p^6 3s^2 3p^5\); 7 valence electrons; charge \(-1\)

About This Question

This is Igcse Model Questions Vol1 2025 Chemistry Question 30. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Easy .

View More Igcse Model Questions Vol1 2025 Chemistry Questions More Igcse Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support