The total number of allowed values of $l$ for a given value of $n$ is equal to _________.

n

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2 n + 1

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2 n - 1

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2 n

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Solution

The correct option is A $n$
In azimuthal quantum number, $l$ (the sub-level) can take only integer values between 0 and $n - 1$ . So total allowed values are $n$ .

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