Periodic Table And Periodicity

Metallic character      - $A l>M g>B>K$

lonic size $\quad\quad-\quad \mathrm{Na}^{+}>\mathrm{Mg}^{+2}>\mathrm{Al}^{+3}>\mathrm{Si}^{+4}$

Electron Gain enthalpy $\quad-\mathrm{F}<\mathrm{Cl}>\mathrm{Br}>\mathrm{I}$