Select another element from group 1 clicking on its symbol. Write the symbols and atomic number for each of the elements that you chose below:


Which element appears larger in the side-by-side comparison?



What is the value in picometers (pm) for the radius of each atom? Do these values support your answer for part b?


Reset the selected data using the reset symbol.


Next, choose an element from a different group by clicking on its symbol. Again choose a second element to compare from the same group. Write the symbols and atomic number for each of the elements that you chose below:


Which element appears larger in the side-by-side comparison?


What is the value in picometers (pm) for the radius of each atom? Do these values support your answer for part e?


Based on your answers in question 1 parts a-f, what is the general trend in the atomic radius of atoms within the same group? Give suggestions for why you think this trend exists based on your interaction with the elements.