The electronic configuration for Neodymium is:

[Atomic Number for Neodymium 60]

The pair of lanthanides in which both elements have high third - ionization energy is :

Given below are two statement: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$

Assertion A: $$5 \mathrm{f}$$ electrons can participate in bonding to a far greater extent than $$4 \mathrm{f}$$ electrons

Reason R: $$5 \mathrm{f}$$ orbitals are not as buried as $$4 \mathrm{f}$$ orbitals

In the light of the above statements, choose the correct answer from the options given below

Prolonged heating is avoided during the preparation of ferrous ammonium sulphate to :