Multiple Choice Question Answer XVIII — task. Science CBSE, Class 9.

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1. Which electronic configuration is most stable

\(3d^5\), \(4s^1\)
\(3d^0\), \(4s^1\)
\(3d^1\), \(4s^1\)
\(3d^2\), \(4s^0\)

2. Which rule is not followed by configuration

Hunds rule
(n + l) rules
Pauli’s rule
Aufbau rues

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