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How many orbitals are possible in the 4^th energy level? (n = 4)

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How many orbitals are possible in the 4th energy level? (n = 4)

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Number of orbitals in 4th energy level = ? 

When n = 4, l = 0,1,2,3 

If l = 0 orbital = 4s = 1

If l = 3 orbital = -3,-2, -1, 0, +1, +2, +3 = 7 

Number of orbitals in 4th energy level = 16.

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