Question

explain the trends in the following factor with respect to ionisation enthalpy 1. nuclear charge 2. screening effect​

Answer 1

Nuclear charge is explained as net positive charge experience in valence electrons. it's equation is Zeef=z-s where z is atomic number and s is shielding electrons.

The shielding effect explain the balance between pull of the protons on valence electrons and the repulsion forces from inner electrons.