Question

Among the following ions, which one will have highest paramagnetic behavior.
CO+3
Cu+2

Cr+3
Fe+3​

Answer 1

Answer:

Fe+3​

Explanation:

Let us first define on what factor paramagnetism depends upon;

In terms of electronic configuration, the more the number of unpaired electrons the more will be the paramagnetic behavior.

Now we see that in,

The number of unpaired electrons in Cu+2 = 1

The number of unpaired electrons in Fe+2 = 4

The number of unpaired electrons in Cr+3 = 3

Hence among the options given, the correct one is Fe+3​