The order of screening effect among s, p, d and f -orbitals of a given shell of an atom in its outer shell electrons is

Step-by-step solution

s has the greatest effect to reduce the force of attraction between the outermost electron and nucleus due to its effective charge density followed by p>d>f . So, according to the screening effect, s orbital being close to the nucleus lacks screening from any other orbital as it is the first and the closest orbital. p orbital electrons are loosely bound with greater size than s block elements as they undergo screening from s orbital electrons. Similarly, d -orbital electrons undergo screening from s and p -block or