Neco 2023 Chemistry Question 36

Practice objective / multiple choice question 36 from the 2023 Neco Chemistry examination.

Neco 2023 Chemistry Objective / Multiple Choice Easy Difficulty
Question 36 NECO • 2023 • CHEMISTRY • objective
Neco 2023 Chemistry Question 36 diagram

The diagram shows an atom of chlorine. The nucleus is labelled with Z = 17 and mass number A = 35. The electron shells are drawn with 2 electrons in the first shell, 8 in the second, and 7 in the third. Using this information, state (i) the number of protons, (ii) the number of neutrons, (iii) the number of electrons, and (iv) write the ground‑state electron configuration of the atom.

Answer Options

A. Protons = 17, Neutrons = 18, Electrons = 18, Electron configuration: 1s\^2 2s\^2 2p\^6 3s\^2 3p\^5
B. Protons = 17, Neutrons = 17, Electrons = 17, Electron configuration: 1s\^2 2s\^2 2p\^6 3s\^2 3p\^5
Correct Answer C. Protons = 17, Neutrons = 18, Electrons = 17, Electron configuration: 1s\^2 2s\^2 2p\^6 3s\^2 3p\^5
D. Protons = 17, Neutrons = 18, Electrons = 17, Electron configuration: 1s\^2 2s\^2 2p\^6 3s\^2 3p\^6
Correct Answer
C
Correct Option:
Protons = 17, Neutrons = 18, Electrons = 17, Electron configuration: 1s\^2 2s\^2 2p\^6 3s\^2 3p\^5

About This Question

This is Neco 2023 Chemistry Question 36. It is one of the objective questions from the 2023 Neco Chemistry examination.

Difficulty level: Easy .

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