Match the column
Column-I
(Possible configuration of Co is given)
Column-II
(To decide ground state electronic configuration)
(A)
(P) Pauli’s Exclusion principle is invalid
(B)

(Q) Aufbau’s principle is invalid
(C)
(R) Hund’s rule is invalid
(D)
(S) All above rules are valid.

Question

Match the column

Column-I

(Possible configuration of Co is given)

Column-II

(To decide ground state electronic configuration)

(A)

(P) Pauli’s Exclusion principle is invalid

(B)

(Q) Aufbau’s principle is invalid

(C)

(R) Hund’s rule is invalid

(D)

(S) All above rules are valid.

TestHub · Accepted Answer

Cobalt (Co) ground state: [Ar] 3d⁷ 4s² follows all rules.

Pauli Principle: No two electrons have same 4 quantum numbers.

Aufbau Principle: Electrons fill lower energy orbitals first (4s before 3d).

Hund’s Rule: Maximize unpaired electrons in degenerate orbitals.

Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub