Neco 2017 Chemistry Question 48

Practice objective / multiple choice question 48 from the 2017 Neco Chemistry examination.

Neco 2017 Chemistry Objective / Multiple Choice Easy Difficulty
Question 48 NECO • 2017 • CHEMISTRY • objective

Element X has atomic number 19. (i) Write its ground‑state electron configuration. (ii) When X forms a monovalent cation, give the electron configuration of the ion and state from which orbital the electron is removed.

Answer Options

A. Ground state: [Ar]3d¹; X⁺: [Ar]; electron removed from the 3d orbital
B. Ground state: [Ar]4p¹; X⁺: [Ar]; electron removed from the 4p orbital
C. Ground state: [Ar]4s²; X⁺: [Ar]4s¹; electron removed from the 4s orbital
Correct Answer D. Ground state: [Ar]4s¹; X⁺: [Ar]; electron removed from the 4s orbital
Correct Answer
D
Correct Option:
Ground state: [Ar]4s¹; X⁺: [Ar]; electron removed from the 4s orbital

About This Question

This is Neco 2017 Chemistry Question 48. It is one of the objective questions from the 2017 Neco Chemistry examination.

Difficulty level: Easy .

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