What are interstitial compounds?

Calculate the number of unpaired electrons in Ti³⁺ , Mn²⁺ and calculate the spin only magnetic moment.

Write the electronic configuration of Ce⁴⁺ and Co²⁺.

Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.

Which is more stable? Fe³⁺ or Fe²⁺? Why ?

Explain the variation in E⁰_{M³⁺/M²⁺}  3d series.

Compare lanthanoids and actinoids.

Explain why Cr²⁺ is strongly reducing while Mn³⁺ is strongly oxidizing.

Compare the ionization enthalpies of first series of the transition elements.

Actinoid contraction is greater from element to element than the lanthanoid contraction, why?