Import Question JSON

$\text{Hint: The order of shielding effect is s orbitals > p orbitals > d orbitals > f orbitals.}$ $\text{Explanation:}$ $\text{As the distance increases, the effective nuclear charge also decreases.}$ $\text{Bromine has atomic number 35, so it has a nuclear charge of +35.}$ $\text{The electronic configuration of Br is: } 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^5$ $\text{Among p-orbitals, 4p orbitals are farthest from the nucleus of the bromine atom.}$ $\text{The electrons in the 4p orbital experience the most shielding because:}$ $\text{- They are shielded by all inner electrons (1s, 2s, 2p, 3s, 3p, 4s, 3d)}$ $\text{- They are in the outermost shell and farthest from the nucleus}$ $\text{Hence, the electrons in the 4p orbital will experience the lowest effective nuclear charge.}$ $\text{These electrons are shielded by electrons present in the 2p and 3p orbitals along with the s-orbitals.}$ $\text{Therefore, 4p electrons experience the lowest effective nuclear charge.}$