Home » The size (diameter) of the five elements are in the order RThe size (diameter) of the five elements are in the order R The size (diameter) of the five elements are in the order R A. R B. T C. W D. X E. Y Correct Answer: Option A Explanation Related Posts The valence electrons in a chloride ion are [17Cl] The position of an element in the Periodic Table is determined by Which quantum divides shells into orbitals? Which Quantum Number Divides Shells into Orbitals? The most common type of chemical reaction that alkanes undergo is What is the Preparation of Phthalimide from Phthalic Acid?