Screening effect (or shielding effect): The electron of valence shell (outer most shell) are attracted towards the nucleus also the valence electron are repelled by the electron present in time shell. This decrease in force of attraction exerted by the nucleus ,on valence electron due to presence of electron in inner shell, is called screening effect or shielding effect. More are the no. of electron in the inner shell more more will be screening effect. slater's rules : Slater gave a set of emperical rules for calculating effective nuclear charge z(eff) z* effective nuclear charge acting on a given electron is caluculated by substracting the screening constant from atomic number (z) z(eff) = atomic nio. - screening constant z(eff) = Z- S Rules 1.are the purpose of estimitating screening constant ns and np electron considered together in a single group while nd and nf elec...
inorganic chemistry inorganic chemistry, atomic structure, periodic properties, covalent bond ,ionic bond, orbital, shape of orbital, numericals, dual nature wave nature bohr's postulates, hinesberg principal, quantum numbers, pauli exclusive principal, aufbau principal, limitation, electronic configuration of lanthanoids and transition elements, screening effect, shielding effect, slater rule and it's limitation.