Answer
Please see the work below.
Work Step by Step
Metallic character
Along a period from left to right metallic character decreases due to the decrease in atomic size and increase in electronegativity.
Down a group from top to bottom metallic character increases due to an increase in atomic size.
Atomic size
Along a period from left to right atomic size decreases due to the increase in nuclear charge and electrons are added to the same shell.
Down a group from top to bottom atomic size increases due to the addition of electrons to the new shells.
Ionization energy
Along a period from left to right ionization energy increases due to the decrease in atomic size and an increase in nuclear charge.
Down a group from top to bottom ionization energy decreases due to the increase in atomic size and increase in shielding effect.
Acidity of oxides
Along a period from left to right acidity of oxides increases due to the increase in the non-metallic character of elements.
Down a group from top to bottom acidity of oxides decreases due to the decrease in the non-metallic character of elements.
