Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Assertion: The atomic size generally decreases across a period.
Reason: Effective nuclear charge increases as the atomic number increases across a period.
Text Solution
Verified by ExpertsThe correct answer is:
A
The atomic size generally decreases across a period. It is because within the period the outer electrons are in the same valence shell and the effective nuclear charge increases as the atomic number increases, resulting in the increased attraction of electrons to the nucleus
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Assertion : The elements beryllium, antimony, arsenic and tellurium have characteristics of both me…
Assertion: Mendeleev periodic table had left the gap under aluminium and a gap under silicon, and c…
Assertion: The elements become more metallic as we go from left to right across the periodic table.…
Assertion: A qualitative measure of the ability of an atom in a chemical compound to attract shared…
Assertion: Energy is always required to remove electrons from an atom and hence ionization enthalpi…
Assertion: The two rows of elements at the bottom of the periodic table are called the lanthanoids …