Question

In a transition series, the orbital in which number of electrons differ element to element is/are:

• A. $p$
• B. $d$
• C. $p,d$ & $f$
• D. $p$ and $d$

Answer 1

The correct option is B $d$

The transition elements are those elements having a partially filled d or f sub-shell in any common oxidation state.

In a particular transition series, the number of $p$ and $s$ electrons remain constant. For a particular transition series number of $d$ electrons vary from element to element. There is increament in $d$ electrons while going from left to right in a transition series.