Shielding Effect v/s Screening Effect
The difference between Shielding effect and Screening Effect can be understood from the table given below:
|
Aspect |
Shielding Effect |
Screening Effect |
|---|---|---|
|
Definition |
Reduction in the effective nuclear charge felt by an electron in an atom due to the presence of inner-shell electrons. |
Reduction in the repulsion between valence electrons in multi-electron atoms, resulting from the presence of inner-shell electrons. |
|
Influence |
Affects the attraction between the nucleus and valence electrons. |
Affects the repulsion between valence electrons. |
|
Cause |
Arises from the repulsion between electrons in different shells, leading to a decrease in the net force felt by outer electrons. |
Arises from the shielding of nuclear charge by inner-shell electrons, reducing the electrostatic repulsion between valence electrons. |
|
Result |
Decreases the effective nuclear charge experienced by outer electrons, leading to less attraction towards the nucleus. |
Reduces the electrostatic repulsion between valence electrons, allowing them to be more tightly held by the nucleus. |
|
Consequences |
Influences atomic size, ionization energy, and electron affinity. |
Affects bonding properties and chemical reactivity. |
Shielding Effect – Definition, Meaning, Examples
Shielding Effect means the blocking of valence shell electrons attracted by the nucleus due to the presence of inner-shell electrons. It occurs when electrons closer to the nucleus “shield” electrons farther away from the positive charge of the nucleus, reducing the effective nuclear charge experienced by the valence electrons.
The shielding effect is significant in understanding trends in atomic properties, such as ionization energies and electronegativity. In this article, we look into what is a shielding effect, its definition, order, effective nuclear charge, formula, Slater’s rule, etc.
Table of Content
- What is the Shielding Effect?
- Order of Screening Effect
- Effective Nuclear Charge
- What is Slater’s Rule?
- Limitation of Slater’s rule
- Screening Effect of Inner Electrons of an Atom