Question

Match the items in List 1 with those in List 2:

Answer 1

A) The shielding effect describes the attraction between an electron and the nucleus in any atom with more than one electron shell. Shielding effect can be defined as a reduction in the effective nuclear charge on the electron cloud, due to a difference in the attraction forces of the electrons on the nucleus. The order of screening effect orbitals is $s>p>d>f$ because as we go from s to f the size of orbital increases and thus the nuclear forces get more space to pass or overcome the boundary of the orbitals. As s has very less space so the nuclear forces gets shielded.

B) Order of energies of orbitals- $f>d>p>s$

C) $Z_{eff}=Z-s$. As close the orbital is to nucleus the more will be the shielding and hence the $Z_{eff}$ will decrease.