Which list of elements from Group 2 on the Periodic Table is arranged in order of increasing atomic radius?
(1) Be, Mg, Ca (3) Ba, Ra, Sr
(2) Ca, Mg, Be (4) Sr, Ra, Ba
According to the periodic table, as you go down a group, atomic radius increases due to increasing number of electron shells. Therefore, your answer (1) Be, Mg, Ca.
