We’re being asked todetermine the number of orbitalscontained in thethird principal level (n = 3).

You are watching: How many orbitals are in the n=3 level

Recall that thequantum numbersthat define an electron are:

Principal Quantum Number(n): faces thesize and energy of the atomic orbital.

Thepossible worths for nare1 come ∞.

Angular momentum Quantum Number(l): encounters theshape the the atomic orbital.

Thepossible values for lare0 come (n – 1).

Magnetic Quantum Number(ml): faces theorientation of the atom orbitalin 3D space.

Thepossible values for mlare the selection of l:–l come +l.

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Problem Details

How plenty of orbitals are contained in the 3rd principal level (n=3) that a offered atom?

A) 7

B) 5

C) 9

D) 3

E) 18

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