Answer:
Element 6 has the lowest ionization energy
Explanation:
The ionization energy increases across the period but decreases down the group of a periodic table.
Which implies that the elements with the lowest ionization energies would be in the bottom left-hand corner of the periodic table. The change in ionization energies is also increases going down the periodic table (by change within a group) than going across the periodic table (by change within a period). From the 3 elements above we could infer that element 6 has the lowest ionization energy.
