Which of the following statements is correct about "shielding effect"? 1. It is effective, when the orbitals…
Which of the following statements is correct about "shielding effect"?
1. It is effective, when the orbitals in the inner shells are completely filled.
2. Inner shells do not show any effect.
3. With increase of shielding down the group, ionisation energy increases.
4. With increasing nuclear charge, the shielding effect increases.
1
2
3
4
Solution
1. Shielding effect is effective, when orbitals in the inner shells are completely filled. So, statement (1) is correct.
2. Inner shells are show effect. So, statement 2 is incorrect.
3. Shielding effect as well as ionisation energy decrease down the group. So, statement 3 is incorrect.
4. With increase in nuclear charge, shielding effect decreases. So, statement 4 is incorrect.