Question

Explain screening effect with a suitable example

Answer 1

Screening effect or shielding effect can be defined as a reduction in the nuclear charge on the electron cloud. This is caused by the difference in the attraction forces of the electrons on the nucleus. Answer:in multiple e- atoms of inner shell acts as a shield between nucleus and valance e-.

Answer 2

Answer:

Screening effect : The inner shell electrons in an atom screen or shield the outermost valence electrons from the nuclear attraction. This effect is called screening effect or shielding effect. The magnitude of screening effect depends upon the number of inner electrons. Higher the number of inner electrons, greater is the value of screening effect. The screening constant is represented by 'o' (sigma). For example, across a period the electrons enter the same shell. Thus, shielding due to inner electrons remain same. Down a group, a new larger valence shell is added which increases the inner electrons and thus the shielding effect increases