# Problem: How many orbitals are contained in the third principal level (n=3) of a given atom?A) 7B) 5C) 9D) 3E) 18

###### FREE Expert Solution
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###### FREE Expert Solution

We’re being asked to determine the number of orbitals contained in the third principal level (n = 3).

Recall that the quantum numbers that define an electron are:

• Principal Quantum Number (n): deals with the size and energy of the atomic orbital

The possible values for n are 1 to ∞.

• Angular Momentum Quantum Number (l): deals with the shape of the atomic orbital

The possible values for l are 0 to (n – 1).

• Magnetic Quantum Number (ml): deals with the orientation of the atomic orbital in 3D space.

The possible values for ml are the range of l:  –l to +l.

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###### Problem Details

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

A) 7

B) 5

C) 9

D) 3

E) 18

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Quantum Numbers: Principal Quantum Number concept. You can view video lessons to learn Quantum Numbers: Principal Quantum Number. Or if you need more Quantum Numbers: Principal Quantum Number practice, you can also practice Quantum Numbers: Principal Quantum Number practice problems.

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Based on our data, we think this problem is relevant for Professor Chen's class at CSULB.