Neco 2019 Chemistry Question 43

Practice objective / multiple choice question 43 from the 2019 Neco Chemistry examination.

Neco 2019 Chemistry Objective / Multiple Choice Easy Difficulty

Question 43 NECO • 2019 • CHEMISTRY • objective

Write the ground‑state electron configuration of chlorine (Z = 17) and state the number of valence electrons.

Correct Answer A. \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{5}\); 7 valence electrons

B. \(1s^{2} 2s^{2} 2p^{5} 3s^{2} 3p^{5}\); 7 valence electrons

C. \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{5}\); 6 valence electrons

D. \(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6}\); 8 valence electrons

Correct Answer

Correct Option:

\(1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{5}\); 7 valence electrons

This is Neco 2019 Chemistry Question 43. It is one of the objective questions from the 2019 Neco Chemistry examination.

Difficulty level: Easy .

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