Arrange the following metal complex / compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin system.
(Atomic numbers Ce = 58, Gd = 64 and Eu = 63.)
(a) (NH₄)₂[Ce(NO₃)₆]
(b) Gd(NO₃)₃ and
(c) Eu(NO₃)₃
Answer is:
Arrange the following metal complex / compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin system.
(Atomic numbers Ce = 58, Gd = 64 and Eu = 63.)
(a) (NH₄)₂[Ce(NO₃)₆]
(b) Gd(NO₃)₃ and
(c) Eu(NO₃)₃
Answer is:
Option 1 -
(a) < (c) < (b)
Option 2 -
(b) < (a) < (c)
Option 3 -
(c) < (a) < (b)
Option 4 -
(a) < (b) < (c)
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1 Answer
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Correct Option - 1
Detailed Solution:The magnetic moment of an ion is determined by its number of unpaired electrons (n). For the given lanthanide ions:
o Ce? has 0 unpaired electrons (4f? ).
o Eu³? has 6 unpaired electrons (4f? ).
o Gd³? has 7 unpaired electrons (4f? ).
Gd³? has the highest number of unpaired electrons and therefore the highest magnetic moment.
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