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(a) Write short notes on: (i) Aufbau p...

(a) Write short notes on: (i) Aufbau principle (ii) Pauli’s principle (iii) Hund’s rule.
(b) Write the electronic configuration of the following ions :
(i) `Fe^(3+)` (ii) `Cu^(+)` [ Given Atomic number of Fe and Cu are 26 & 29]

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