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How many sub-shells are associated with n = 4?

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#### Solution 1

n = 4 (Given)

For a given value of ‘n’, ‘l’ can have values from zero to (n – 1).

∴ l = 0, 1, 2, 3

Thus, four sub-shells are associated with n = 4, which are s, p, d and f.

#### Solution 2

n = 4, l = 0, 1, 2, 3. 4 sub-shells are associated with n = 4

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