Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the one that is best in each case.
For elements in the left-most column of the periodic table, properties that have increasing values as the atomic number increases include which of the following?
|I.||Ionization energy (potential)|
Select an Answer
I and II only
II and III only
I, II, and III
Going down a group of the periodic table, atomic radius and atomic mass increase. Because effective nuclear charge is about the same within a group and radius increases going down a group, ionization energy decreases going down a group.