Question

If a lanthonoid ion $\left(M^{3+}\right)$ having ${}^{\prime }{n}^{\prime }$ f-electrons is pink coloured, then the lanthanoid ion with $(14-n)$ f-electrons will be:

• A. blue
• B. red
• C. green
• D. pink

Answer 1

The correct option is D pink

In case of lanthanoids $M^{3+}$ ion, the element with '$n$' $f$-electrons has a similar colour to that of the ion having $(14-n)$ $f$-electrons.