Question

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

Answer 1

1) Be, Mg, Ca Be, Mg, Ca, Sr, Ba, Rb are increasing layers

Answer 2

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.