Post Utme Joseph Ayo Babalola University 2018 Chemistry Question 29

Practice objective / multiple choice question 29 from the 2018 Post Utme Joseph Ayo Babalola University Chemistry examination.

Post Utme Joseph Ayo Babalola University 2018 Chemistry Objective / Multiple Choice
Question 29 POST_UTME_JOSEPH_AYO_BABALOLA_UNIVERSITY • 2018 • CHEMISTRY • objective

The atomic radius of an element in the periodic table increases down a group due to the addition of new energy levels. However, the atomic radius of an element in the periodic table decreases across a period due to the increase in effective nuclear charge. What is the correct explanation for this tr\end?

Answer Options

Correct Answer A. The increase in atomic radius down a group is due to the addition of new energy levels, while the decrease in atomic radius across a period is due to the increase in effective nuclear charge.
B. The increase in atomic radius down a group is due to the decrease in effective nuclear charge, while the decrease in atomic radius across a period is due to the addition of new energy levels.
C. The increase in atomic radius down a group is due to the increase in atomic mass, while the decrease in atomic radius across a period is due to the increase in effective nuclear charge.
D. The increase in atomic radius down a group is due to the decrease in atomic mass, while the decrease in atomic radius across a period is due to the decrease in effective nuclear charge.
Correct Answer
A
Correct Option:
The increase in atomic radius down a group is due to the addition of new energy levels, while the decrease in atomic radius across a period is due to the increase in effective nuclear charge.

About This Question

This is Post Utme Joseph Ayo Babalola University 2018 Chemistry Question 29. It is one of the objective questions from the 2018 Post Utme Joseph Ayo Babalola University Chemistry examination.

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