Which of the following pair of transition metal ions have the same calculated values of magnetic moment?

Question

Which of the following pair of transition metal ions have the same calculated values of magnetic moment? (A) Ti2+ and V2+ (B) Fe2+ and Cu2+ (C) Cr2+ and Fe2+ (D) CO2+ and Ti2+

Tardigrade Admin · Accepted Answer

Cr2+ (Z=24): [Ar]3d4 4s0; four unpaired electrons Fe2+ (Z=26): [Ar]3d6 4s0; four unpaired electrons Cr2+ and Fe2+ have same number of unpaired electrons hence they have the same value of magnetic moment.

Q. Which of the following pair of transition metal ions have the same calculated values of magnetic moment?

$T i^{2 +}$ and $V^{2 +}$

$F e^{2 +}$ and $C u^{2 +}$

$C r^{2 +}$ and $F e^{2 +}$

$C O^{2 +}$ and $T i^{2 +}$

$C r^{2 +} (Z = 24) :$
$[A r] 3 d^{4} 4 s^{0};$ four unpaired electrons
$F e^{2 +} (Z = 26) :$
$[A r] 3 d^{6} 4 s^{0};$ four unpaired electrons
$C r^{2 +}$ and $F e^{2 +}$ have same number of unpaired electrons hence they have the same value of magnetic moment.

Q. Which of the following pair of transition metal ions have the same calculated values of magnetic moment?

Ti2+ and V2+

Fe2+ and Cu2+

Cr2+ and Fe2+

CO2+ and Ti2+

Cr2+(Z=24): [Ar]3d44s0; four unpaired electrons Fe2+(Z=26): [Ar]3d64s0; four unpaired electrons Cr2+ and Fe2+ have same number of unpaired electrons hence they have the same value of magnetic moment.

$T i^{2 +}$ and $V^{2 +}$

$F e^{2 +}$ and $C u^{2 +}$

$C r^{2 +}$ and $F e^{2 +}$

$C O^{2 +}$ and $T i^{2 +}$

$C r^{2 +} (Z = 24) :$
$[A r] 3 d^{4} 4 s^{0};$ four unpaired electrons
$F e^{2 +} (Z = 26) :$
$[A r] 3 d^{6} 4 s^{0};$ four unpaired electrons
$C r^{2 +}$ and $F e^{2 +}$ have same number of unpaired electrons hence they have the same value of magnetic moment.