Neco Model Questions Vol1 2020 Chemistry Question 44

Practice objective / multiple choice question 44 from the 2020 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2020 Chemistry Objective / Multiple Choice Easy Difficulty
Question 44 NECO_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • objective
Neco Model Questions Vol1 2020 Chemistry Question 44 diagram

The diagram shows the electron configuration of a neutral atom of an element. The K shell contains 2 electrons, the L shell 8 electrons and the M shell 7 electrons. Identify the element and write its ground‑state electron configuration in spectroscopic notation.

Answer Options

Correct Answer A. Chlorine (Cl); electron configuration \(1s^{2}\,2s^{2}\,2p^{6}\,3s^{2}\,3p^{5}\)
B. Potassium (K); electron configuration \(1s^{2}\,2s^{2}\,2p^{6}\,3s^{2}\,3p^{6}\,4s^{1}\)
C. Sulfur (S); electron configuration \(1s^{2}\,2s^{2}\,2p^{6}\,3s^{2}\,3p^{4}\)
D. Argon (Ar); electron configuration \(1s^{2}\,2s^{2}\,2p^{6}\,3s^{2}\,3p^{6}\)
Correct Answer
A
Correct Option:
Chlorine (Cl); electron configuration \(1s^{2}\,2s^{2}\,2p^{6}\,3s^{2}\,3p^{5}\)

About This Question

This is Neco Model Questions Vol1 2020 Chemistry Question 44. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Easy .

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