Moving from Scandium () to Chromium () in the first half of the 3d series, the atomic radius progressively and steadily decreases. Which principle correctly explains this phase?

Question

Moving from Scandium ($Sc$) to Chromium ($Cr$) in the first half of the 3d series, the atomic radius progressively and steadily decreases. Which principle correctly explains this phase?

Prashant Kotian · Accepted Answer

Correct answer: C. In the early part of the series, the sparse electrons entering the subshell provide very poor shielding. As protons are added, the increasing Effective Nuclear Charge strongly dominates, pulling the outermost shell inward.

💡 Solution & Explanation

Practice 22,000+ questions like this