NEET Chemistry Quantum Mechanical Model Assertion Reason Question
Assertion (A): The order of filling of orbitals in an atom follows the sequence: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p.
Reason (R): The energy of a given orbital depends upon the effective nuclear charge and is the same for all atoms.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Correct Answer
Detailed Explanation
The assertion is correct as it follows the order of filling based on increasing energies. However, the reason is false because the energy of orbitals is not the same for all atoms; it varies with effective nuclear charge.
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