For homework, we did a lab called comparing atom sizes. What we needed to do is simple. Find the relative radius of an atom by diving the radius of an element with the radius of the first element in the group. In order to understand the increasing and decreasing oh the relative radius of the atoms, we needed to do a graph which is showed above.
Conclusion: Predict where you would find the largest atom in any group of elements. What evidence would you need to tell if your prediction is correct? You would find the largest atom in a group at the bottom of the column. The evidence that I would need to tell if my prediction is correct, is making table like the above one and finding all the relative radius of the family