MereTeacher

JEE • NEET • FOUNDATION

JEE · NEET Previous Year Question

$The electronic configuration of Pt (atomic number 78) is:$

Topic: JEE PYQ

Answer: A. Full step-by-step solution below.

A $[Xe] 4 f^{14} 5 d^{9} 6 s^{1}$
B $[Kr] 4 f^{14} 5 d^{10}$
C $[Xe] 4 f^{l 4} 5 d^{10}$
D $[Xe] 4 f^{14} 5 d^{8} 6 s^{2}$

Correct answer: A

Solution

(a)_{78} Pt = [Xe] 4 f^{14} 5 d^{9} 6 s^{1} (Exceptional electronic configuration)

More Atomic Structure PYQs

$Uncertainity in the position of an electron (mass = 9.1 \times 1 0^{-31} Kg) moving with a velocity 300 m. se c^{-1}, Accurate up to\dots$
$Wavenumber for a radiation having 5800 A \dots wavelength is x \times 10 cm^{- 1} . The value of x is_____ (\dots$
$For emission line of atomic hydrogen from n_{i} = 8 to n_{f} = n, the plot of wave number (v) against\dots$
$Which of the following statements regarding the energy of the stationary state is true in the following one - electron systems?$
$When the azimuthal quantum number has the value of 2 , the number of orbitals possible are$