Consider the ions Eu(III), Gd(III), Sm(III) and Lu(III). The observed calculated magnetic moment values are closest for the pair -

Question

Consider the ions Eu(III), Gd(III), Sm(III) and Lu(III). The observed calculated magnetic moment values are closest for the pair - (A) Gd(III), Lu(III) (B) Eu(III), Lu(III) (C) Sm(III), Gd(III) (D) Sm(III), Eu(III)

Tardigrade Admin · Accepted Answer

The electronic configuration of Gd3+ and Lu3+ are Af7 and 4f14 for this ions, total angular momentum is zero i.e., there is no orbital contribution. Therefore, calculated and observed values of magnetic moment are closest for this pair

Q. Consider the ions $E u (III), G d (III), S m (III)$ and $Lu (III)$ . The observed & calculated magnetic moment values are closest for the pair -

$G d (III), Lu (III)$

$E u (III), Lu (III)$

$S m (III), G d (III)$

$S m (III), E u (III)$

The electronic configuration of $G d^{3 +}$ and $L u^{3 +}$ are $A f^{7}$ and $4 f^{14}$ for this ions, total angular momentum is zero i.e., there is no orbital contribution. Therefore, calculated and observed values of magnetic moment are closest for this pair

Q. Consider the ions Eu(III),Gd(III),Sm(III) and Lu(III). The observed & calculated magnetic moment values are closest for the pair -

Gd(III),Lu(III)

Eu(III),Lu(III)

Sm(III),Gd(III)

Sm(III),Eu(III)