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Assertion: The Aufbau principle states that electrons fill orbitals in order of increasing energy.
Reason: Electrons always try to occupy the lowest available energy level.
Both assertion and reason are true, and the reason is the correct explanation of the assertion.
Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
The assertion is true, but the reason is false.
The assertion is false, but the reason is true.
Answers (1)
The Aufbau principle is a fundamental principle in chemistry that describes how electrons are added to atoms. According to this principle, electrons fill orbitals in order of increasing energy, starting with the lowest energy level. The reason for this is that electrons always try to occupy the lowest available energy level in order to be more stable. Therefore, both Assertion and Reason are correct, and Reason correctly explains the Assertion. Hence option A is the correct answer.
Option (B) is incorrect because it incorrectly states that the assertion is correct but the reason is incorrect. Both the assertion and reason are correct. Hence option B is incorrect.
Option (C) is incorrect because it incorrectly states that the assertion is incorrect but the reason is correct. The assertion is correct, and the reason is also correct. Hence option C is incorrect.
Option (D) is incorrect because it incorrectly states that both the assertion and reason are incorrect. Both the assertion and reason are correct. Hence option D is incorrect.
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