Which of the following has the largest radius?
A) Cr
B) Cl
C) Cu
D) Gd
E) Ga

Question

Quizplus · Accepted Answer

Gd is an element located towards the bottom right corner of the periodic table, which means it has a relatively large atomic radius compared to the other options. The atomic radius decreases across a period from left to right due to increasing effective nuclear charge, and it increases down a group due to the addition of new electron shells. Therefore, Cr (A) and Cl (B) are located in the same period and have smaller radii than Gd, while Cu (C) and Ga (E) are located in lower rows of their respective groups, but they are not as far down as Gd.

Which of the Following Has the Largest Radius