Igcse Model Questions Vol1 2020 Chemistry Question 5

Practice objective / multiple choice question 5 from the 2020 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2020 Chemistry Objective / Multiple Choice Easy Difficulty
Question 5 IGCSE_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • objective

An element X has an atomic number of 15 and an atomic mass of 31.0 u.\n(a) State the number of protons, neutrons and electrons in a neutral atom of X.\n(b) Identify the element and give its chemical symbol.\n(c) Write the ground‑state electron configuration of X using the Aufbau principle.

Answer Options

A. 14 p, 17 n, 14 e; Si; 1s² 2s² 2p⁶ 3s² 3p³
B. 15 p, 16 n, 15 e; P; 1s² 2s² 2p⁶ 3s¹ 3p³
Correct Answer C. 15 p, 16 n, 15 e; P; 1s² 2s² 2p⁶ 3s² 3p³
D. 15 p, 15 n, 15 e; P; 1s² 2s² 2p⁶ 3s² 3p²
Correct Answer
C
Correct Option:
15 p, 16 n, 15 e; P; 1s² 2s² 2p⁶ 3s² 3p³

About This Question

This is Igcse Model Questions Vol1 2020 Chemistry Question 5. It is one of the objective questions from the 2020 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Easy .

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