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Showing 6–10 of 1860 MCQs

Atomic Structure Electronic Configuration and Valency

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A neutral atom has the configuration: 1s² 2s² 2p⁶ 3s¹ Its usual valency is:

Atomic Structure Magnetic Quantum Number and Orbital Orientation

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An orbital has quantum numbers n = 2, ℓ = 1 and mℓ = 0. It is commonly represented as:

Atomic Structure Unpaired Electrons in Ions

8

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Which ion has the greatest number of unpaired electrons?

Atomic Structure Aufbau Principle

9

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Which electronic configuration correctly follows the Aufbau filling order?

Atomic Structure Exceptions to Aufbau Principle

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Which pair consists of well-known exceptions to the simple Aufbau prediction?

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