Which of the following sets has elements with the most nearly identical atomic radii?
A) Mg, Ca, Sr, Cs
B) Be, B, C, N
C) Ne, Kr, Ar, Xe
D) C, P, Se, Br
E) Cr, Fe, Co, Mn

Question

Quizplus · Accepted Answer

The elements in set E (Cr, Fe, Co, Mn) are all transition metals in the same period (4th period) of the periodic table, which means they have similar atomic radii due to the filling of the d-orbitals.

Which of the Following Sets Has Elements with the Most