Neco 2019 Chemistry Question 25

Practice objective / multiple choice question 25 from the 2019 Neco Chemistry examination.

Neco 2019 Chemistry Objective / Multiple Choice Easy Difficulty
Question 25 NECO • 2019 • CHEMISTRY • objective

The element with atomic number 31 is arsenic. Write its ground‑state electron configuration using the noble‑gas core notation and state the block of the periodic table to which it belongs.

Answer Options

A. [Ar] 3d^{10} 4s^{2} 4p^{2}; p‑block
B. [Ar] 3d^{9} 4s^{2} 4p^{1}; p‑block
Correct Answer C. [Ar] 3d^{10} 4s^{2} 4p^{1}; p‑block
D. [Ar] 3d^{10} 4s^{2} 4p^{1}; s‑block
Correct Answer
C
Correct Option:
[Ar] 3d^{10} 4s^{2} 4p^{1}; p‑block

About This Question

This is Neco 2019 Chemistry Question 25. It is one of the objective questions from the 2019 Neco Chemistry examination.

Difficulty level: Easy .

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