Which of the following statements is wrong for the transition elements?

Options

A. Transition elements are placed from `3^(rd)` to `6^(th)` period
B. Last electron enters in (n-1) d orbital
C. Exhibits variable valency
D. General electronic configuration is (n-1) `d^(1-10)ns^(0-2)`

Answer

A

Explanation

Transition elements starts from `4^(th)` period as they have valence shell configuration `(n-1)d^(1-10)ns^(0-2)`Thus for n=3, there is no d-orbital available.