Question

the third ionization energy of mn is higher than that of cr

Answer 1

$ASSALAMUALAIKUM$

(i) This is because Mn 2+ is more stable as it has exactly half filled configuration 3d5 4s0 .

(ii) Cu 2+(aq) is much more stable than Cu +(aq). This is because, although second ionization enthalpy of copper is large but for Cu 2+(aq) is much more negative than that of Cu +(aq) and therefore, it more than compensates for the second ionisation enthalpy of copper. Therefore, Cu + ion aqueous solution undergoes disproportionation.

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Answer 2

heya...!!!

✔here is ua answer:

(i) This is because Mn 2+ is more stable as it has exactly half filled configuration 3d5 4s0 .

(ii) Cu 2+(aq) is much more stable than Cu +(aq). This is because, although second ionization enthalpy of copper is large but for Cu 2+(aq) is much more negative than that of Cu +(aq) and therefore, it more than compensates for the second ionisation enthalpy of copper. Therefore, Cu + ion aqueous solution undergoes disproportionation.

hope it helps..!!❤