JEE Main202127 Aug 2021Morning ShiftChemistryThermodynamics (C)Actual

The number of f electrons in the ground state electronic configuration of Np ( Z = 93 ) is ______ .(Integer answer)

Correct answer

Step-by-step solution

1 s 2 2   s 2 2 p 6 3   s 2 3 p 6 4   s 2 3   d 10 4 p 6 5   s 2 4   d 10 5 p 6 6   s 2 4 f 14 5   d 10 6 p 6 7   s 2 5 f 4 6 d 1   Np 93 = Rn 86 5 f 4 6   d 1 7   s 2 Total no. of electron in f subshell = 14 in 4 f and 4 in 5 f subshell = 18 e -

Practice Thermodynamics (C) on Quantrex Academy →

More from Thermodynamics (C)

An ideal gas ( 0.5 mol), initially at 2 bar pressure, is compressed at a constant temperature of 600 K in two steps: first, against a constant external pressure of P bar ( 2 < P < 2026 List-I contains various physical/chemical processes, and List-II contains combinations of changes in enthalpy ( H ) and entropy ( S ). Match each entry in List-I to the appropriate 2026 Consider the reaction 2 H ₂ S (g) + 3 O ₂(g) 2 H ₂ O (l) + 2 SO ₂(g) The magnitude of enthalpy change for the reaction in kJ mol ⁻¹ is ________. (Nearest integer) Given: _fH^ ( H ₂ 2026 Match List - I with List - II. Given V₁ and V₂ are initial and final volumes respectively. List - I (Isothermal process) List - II (Expression) A. Reversible expansion I. q = 0 B. 2026 Arrange the following isothermal processes in order of the magnitude of the work ( p - V ) involved between states 1 and 2 . A. Expansion in single stage w_A B. Expansion in multi 2026 Consider the reaction X Y at 300 K. If H^ and K are 28.40 kJ mol ⁻¹ and 1.8 10⁻⁷ at the same temperature, then the magnitude of S^ for the reaction in J K ⁻¹ mol ⁻¹ is _______. (Ne 2026 Consider the following data for the reaction X₂(g) + Y₂(g) 2XY(g) at 600 K . The _r G^ (in kJ mol ⁻¹ ) for the reaction is : Compound _f H^ _ 600K (kJ mol ⁻¹ ) S^ _ 600K (J mol ⁻¹ 2026 The correct order of molar heat capacities measured at 298 K and 1 bar is : 2026 Full Thermodynamics (C) list All JEE Main PYQs