Question

write the electronic configuration of D block element​

Answer 1

(n-1)d1-10ns1-2

The n-1 stands for inner d orbitals which may have one to ten electrons

And outermost ns orbital may have one or two electrons

This is the base of the electronic configuration of d-block elements

From left to right in a period, no. of valence shells increases (Periods)
And in groups, all the elements of d block have same no. of shells