The electrons in a poly -electronic atom are filled one by one in roder fo increasing energy level . The enrgy fo subsgells and orientation depeds upon the values of three quantum numbers 9 i.e., n. l and m respectively derived from Schrodinger wave equation . The different orbitals fo a subsshells however possess same energy level and are called degenerater orbitals but their enrgy level charges in presenct fo magentic field and the orbitals are non-degenerate . (A) spectral line is noticed it an electron jups form one level to tohere . the paramgnetic nature of eelment sis due to the presence of unpaired electron .
which element has ` 18` electrons in its outermost shell ?

Options

A. ` Cu`
B. `Pd`
C. `Cd`
D. Te

Answer

B

Explanation

Pd as ` 4s^1 4p^6 4d^(10)` configuration since it was found to the paramangetic .