Question

determine which of the following has the largest atomic radius. write out the full name. if the answer is an ion, write out the correct name of the ion followed by the word ion. rb or zr

Explanation:

Step1: Recall atomic - radius trend

Atomic radius decreases across a period from left to right in the periodic table. Rb (rubidium) is in Group 1 and Zr (zirconium) is in Group 4 of the same period (Period 5).

Step2: Compare positions

Since Rb is to the left of Zr in Period 5, Rb has a larger atomic radius.

Answer:

rubidium