The general valence shell electronic configuration of transition elements is

Options

A. `(n - 1) d^(1-10) ns^(1-2)`
B. `(n - 1) d^(0-10) ns^(1-2)`
C. `(n - 1) d^(1-10) ns^(0-2)`
D. `(n - 1) d^(1-10) ns^(2)`

Answer

C

Explanation

Transition elements are characterized the fact that the last electron enters the d-subshell of penultimate shell. In Pt there is no electron in the ns subshell. Thus, the transition elements have a general electronic configuration:
`(n - 1) d^(1-10) ns^(0-2)`