Neco Model Questions Vol1 2018 Chemistry Question 20

Practice objective / multiple choice question 20 from the 2018 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Easy Difficulty

Question 20 NECO_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

Neco Model Questions Vol1 2018 Chemistry Question 20 diagram

The diagram shows an atom with three electron shells: the K shell contains 2 electrons, the L shell contains 8 electrons, and the M shell contains 5 electrons. Identify the element and write its ground‑state electron configuration.

Answer Options

A. Element: sulfur (S); electron configuration: \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{4}\)

B. Element: silicon (Si); electron configuration: \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{2}\)

Correct Answer C. Element: phosphorus (P); electron configuration: \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{3}\)

D. Element: chlorine (Cl); electron configuration: \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{5}\)

Correct Answer

Correct Option:

Element: phosphorus (P); electron configuration: \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{3}\)

About This Question

This is Neco Model Questions Vol1 2018 Chemistry Question 20. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Easy .

View More Neco Model Questions Vol1 2018 Chemistry Questions More Neco 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