Decrease in size from left to right in actinoid series is greater and gradual than that in lanthanoid series due to :

Question

Decrease in size from left to right in actinoid series is greater and gradual than that in lanthanoid series due to : (A) 4 f orbitals are penultimate (B) 4 f orbitals have greater shielding effect (C) 5 f orbitals have poor shielding effect (D) 5 f orbitals have greater shielding effect

Tardigrade Admin · Accepted Answer

5 f have poor shielding effect so more will be Z text eff At. size propto (1/Z text eff )

Q. Decrease in size from left to right in actinoid series is greater and gradual than that in lanthanoid series due to :

$4 f$ orbitals are penultimate

$4 f$ orbitals have greater shielding effect

5 f orbitals have poor shielding effect

$5 f$ orbitals have greater shielding effect

$5 f$ have poor shielding effect so more will be $Z_{eff}$ At. size $\propto \frac{1}{Z _{eff}}$

Q. Decrease in size from left to right in actinoid series is greater and gradual than that in lanthanoid series due to :

4f orbitals are penultimate

4f orbitals have greater shielding effect

5 f orbitals have poor shielding effect

5f orbitals have greater shielding effect

5f have poor shielding effect so more will be Zeff ​ At. size ∝Zeff ​1​

$4 f$ orbitals are penultimate

$4 f$ orbitals have greater shielding effect

$5 f$ orbitals have greater shielding effect

$5 f$ have poor shielding effect so more will be $Z_{eff}$ At. size $\propto \frac{1}{Z _{eff}}$