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

You are watching: How many orbitals (total) are contained in the third principal level (n=3) of a given atom?

Recall the thequantum numbersthat define an electron are:

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

Thepossible worths for nare1 come ∞.

Angular inert Quantum Number(l): encounters theshape that the atom orbital.

Thepossible worths for lare0 come (n – 1).

Magnetic Quantum Number(ml): deals with theorientation the the atomic orbitalin 3D space.

Thepossible worths for mlare the range of l:–l come +l.

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Problem Details

How plenty of orbitals are included 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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