Question

The melting point of $Zn$ is lower as compared to those of the other element of $3d$ series because:

• A. The d-orbitals are completely filled
• B. The d-orbitals are partially filled
• C. $Zn$ is a transition element
• D. all of these

Answer 1

The correct option is A The d-orbitals are completely filled

In $Zn\to 1s^{2}2s^{2}3s^{2}3p^{6}3d^{10}4s^2$, the d-orbitals are completely filled i.e. absence of unpaired electrons in their atoms. Hence, the melting point is low.