In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices.
Assertion: The energy of an electron is largely determined by its principal quantum number.
Reason: The principal quantum number, 
is a measure of the most probable distance of finding the electron around the nucleus.
Text Solution
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We know that principal quantum number represents the main energy level or energy shell. Since each energy level is associated with a definite amount of energy, this quantum number determines to a large extent the energy of an electron. It also determines the average distance of an electron around the nucleus. Therefore, both Assertion and Reason are true and the Reason is a correct explanation the Assertion.
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