In which of the following arrangements, the given sequence is not strictly according to the properties indicated against it?

Due to filled outer orbital  $2s^2,Be$  has more ionization enthalpy than B
Due to high electron density of F-atom, there is more repulsion between coming electron. So, electron affinity of F is lesser than Cl.
 $\therefore \left(-{\Delta }_{eg}H\right):Cl>F>Br>I$
For monoatomic isoelectronic ions, more the number of protons lesser will be ionic size