Q. The element that does not belong to the same period of the remaining elements (modern periodic table) is:
A) Iridium
B) Platinum
C) Osmium
D) Palladium
Explanation
[Solution by Dr. Abubacker] Iridium, platinum and osmium are 5d elements of period 6, whereas palladium ($4d^{10}$) belongs to period 5. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.