Answer:
Generally true.
Step-by-step explanation:
As you go down the columns of the Periodic Table, the radius of the atom increases.
As you go across the Periodic Table (left to right), the radius of the atoms decrease.
Therefore, the second element on the table, Helium, has the smallest radius and element 87, Francium has the largest radius.
There are a few exception scattered throughout the table, such as the lanthanides and actinides, but generally speaking the radius increases as you travel from right to left and top to bottom.