Final answer:
Strontium (Sr) has a higher atomic radius compared to beryllium (Be).
Step-by-step explanation:
Beryllium (Be) and strontium (Sr) are both elements in Group 2 of the Periodic Table, known as the Alkaline Earth Metals. When comparing the atomic radius of these two elements, strontium (Sr) has a higher atomic radius than beryllium (Be). This is because atomic radius generally increases as you move down a group in the Periodic Table. Therefore, the answer is B) Strontium.