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

You are watching: How many orbitals are in the third principal energy level

Recall that thequantum numbersthat specify an electron are:

Principal Quantum Number(n): deals with thesize and energy that the atomic orbital.

Thepossible values for nare1 come ∞.

Angular inert Quantum Number(l): faces theshape of 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 to +l.

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Problem Details

How countless orbitals are consisted of in the third principal level (n=3) that a offered atom?

A) 7

B) 5

C) 9

D) 3

E) 18

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