Which of the following has highest second ionisation energy

Question

Which of the following has highest second ionisation energy (A) Chromium (B) Calcium (C) Iron (D) Cobalt

Tardigrade Admin · Accepted Answer

The electronic configuration of 24 Cr is [ Ar ]18 3 d15 4 s1. Chromium after loss of one electron gain stable configuration due to presence of half filled d-orbitals, therefore its second ionisation enthalphy is highest.

Q. Which of the following has highest second ionisation energy

Chromium

Calcium

Iron

Cobalt

The electronic configuration of $_{24} C_{r}$ is $[A r]_{18} 3 d_{1}^{5} 4 s^{1}$ . Chromium after loss of one electron gain stable configuration due to presence of half filled d-orbitals, therefore its second ionisation enthalphy is highest.

Q. Which of the following has highest second ionisation energy

Chromium

Calcium

Iron

Cobalt

The electronic configuration of 24​Cr​ is [Ar]18​3d15​4s1. Chromium after loss of one electron gain stable configuration due to presence of half filled d-orbitals, therefore its second ionisation enthalphy is highest.

The electronic configuration of $_{24} C_{r}$ is $[A r]_{18} 3 d_{1}^{5} 4 s^{1}$ . Chromium after loss of one electron gain stable configuration due to presence of half filled d-orbitals, therefore its second ionisation enthalphy is highest.