Question

The values of second ionization enthalpy of Cr and Cu are found to be more than their neighbouring elements.Explain by giving reasons.

Answer 1

Answer:

Explanation:

3d obbital is more energetically

Cu 30 3d5 4s2..

Answer 2

Ionization enthalpy of Cu and Cr:

Ionization enthalpy refers the amount of energy required by the element to lose an electron from its gaseous state.

• The electronic configuration of chromium (Cr) is $\bold{4s^{1}3d^{5}}$
• The electronic configuration of copper (Cu) is $\bold{3d^{10}4s^{1}}$

In the above element, the last orbital of the elements is half or fully filled.

Thus, the energy required by the elements to lose the electron becomes higher than the usual.