Question

Assertion : The quantized energy of an electron is largely determined by its principal quantum number.
Reason : The principal quantum number $(n)$ is a measure of the most probable distance of finding the electron around the nucleus.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

$E=-\frac{2\pi^{2}k^{2}m^{4}_{e}}{n^{2}h^{2}}$
where n = principal quantum number which has only integral value, it follows that total energy is quantized.